feat: Mutability tracking by aleksanderkatan · Pull Request #2390 · software-mansion/TypeGPU

aleksanderkatan · 2026-04-17T12:20:33Z

We could keep and propagate info about unmodified consts (WGSL const) to handle cases like the below, but I think it is outside the scope of this PR

const v = d.vec2f();
const v1 = v;
const v2 = v1;
const a = v2.x

I don't really like how this is implemented, but I see no better way. Maybe we could mark at implicit pointer dereference in convertToCommonType to avoid some of the ref/unroll calls, but this requires better origin tracking.

…el (#2304) Fixes #2160 Co-authored-by: Matt Van Horn <455140+mvanhorn@users.noreply.github.com>

github-actions · 2026-04-17T12:21:31Z

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https://pkg.pr.new/software-mansion/TypeGPU/typegpu@45237b22919177867de4f6378a8434662fc78be5

https://pkg.pr.new/software-mansion/TypeGPU/@typegpu/noise@45237b22919177867de4f6378a8434662fc78be5

https://pkg.pr.new/software-mansion/TypeGPU/unplugin-typegpu@45237b22919177867de4f6378a8434662fc78be5

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github-actions · 2026-04-17T12:22:05Z

📊 Bundle Size Comparison

🟢 Decreased	➖ Unchanged	🔴 Increased	❔ Unknown
0	57	294	0

👀 Notable results

Static test results:

No major changes.

Dynamic test results:

Test	tsdown
WgslGenerator from typegpu.ts	103.27 kB ($${\color{red}+0.9\%}$$)

📋 All results

Click to reveal the results table (350 entries).

Test	tsdown
WgslGenerator from typegpu.ts	103.27 kB ($${\color{red}+0.9\%}$$)
tgpuImportEverything.ts	252.78 kB ($${\color{red}+0.4\%}$$)
tgpu from typegpu.ts	252.78 kB ($${\color{red}+0.4\%}$$)
tgpu.fn from typegpu.ts	252.79 kB ($${\color{red}+0.4\%}$$)
tgpu.init from typegpu.ts	252.79 kB ($${\color{red}+0.4\%}$$)
tgpu.lazy from typegpu.ts	252.79 kB ($${\color{red}+0.4\%}$$)
tgpu.slot from typegpu.ts	252.79 kB ($${\color{red}+0.4\%}$$)
tgpu.const from typegpu.ts	252.79 kB ($${\color{red}+0.4\%}$$)
tgpu.unroll from typegpu.ts	252.79 kB ($${\color{red}+0.4\%}$$)
tgpu.resolve from typegpu.ts	252.79 kB ($${\color{red}+0.4\%}$$)
tgpu.accessor from typegpu.ts	252.79 kB ($${\color{red}+0.4\%}$$)
tgpu.comptime from typegpu.ts	252.79 kB ($${\color{red}+0.4\%}$$)
tgpu.vertexFn from typegpu.ts	252.79 kB ($${\color{red}+0.4\%}$$)
tgpu.computeFn from typegpu.ts	252.79 kB ($${\color{red}+0.4\%}$$)
tgpu.fragmentFn from typegpu.ts	252.79 kB ($${\color{red}+0.4\%}$$)
tgpu.privateVar from typegpu.ts	252.79 kB ($${\color{red}+0.4\%}$$)
tgpuImportOne.ts	252.79 kB ($${\color{red}+0.4\%}$$)
tgpu.vertexLayout from typegpu.ts	252.79 kB ($${\color{red}+0.4\%}$$)
tgpu.workgroupVar from typegpu.ts	252.79 kB ($${\color{red}+0.4\%}$$)
tgpu.initFromDevice from typegpu.ts	252.80 kB ($${\color{red}+0.4\%}$$)
tgpu.bindGroupLayout from typegpu.ts	252.80 kB ($${\color{red}+0.4\%}$$)
tgpu.mutableAccessor from typegpu.ts	252.80 kB ($${\color{red}+0.4\%}$$)
tgpu.resolveWithContext from typegpu.ts	252.80 kB ($${\color{red}+0.4\%}$$)
importEntireLibrary.ts	280.02 kB ($${\color{red}+0.4\%}$$)
bool from typegpudata.ts	10.81 kB ($${\color{red}+0.2\%}$$)
f16 from typegpudata.ts	10.81 kB ($${\color{red}+0.2\%}$$)
f32 from typegpudata.ts	10.81 kB ($${\color{red}+0.2\%}$$)
i32 from typegpudata.ts	10.81 kB ($${\color{red}+0.2\%}$$)
u32 from typegpudata.ts	10.81 kB ($${\color{red}+0.2\%}$$)
u16 from typegpudata.ts	10.84 kB ($${\color{red}+0.2\%}$$)
textureDepth2d from typegpudata.ts	11.26 kB ($${\color{red}+0.1\%}$$)
textureDepthCube from typegpudata.ts	11.26 kB ($${\color{red}+0.1\%}$$)
texture1d from typegpudata.ts	11.27 kB ($${\color{red}+0.1\%}$$)
texture2d from typegpudata.ts	11.27 kB ($${\color{red}+0.1\%}$$)
texture3d from typegpudata.ts	11.27 kB ($${\color{red}+0.1\%}$$)
textureCube from typegpudata.ts	11.27 kB ($${\color{red}+0.1\%}$$)
textureDepth2dArray from typegpudata.ts	11.27 kB ($${\color{red}+0.1\%}$$)
textureDepthCubeArray from typegpudata.ts	11.28 kB ($${\color{red}+0.1\%}$$)
textureDepthMultisampled2d from typegpudata.ts	11.28 kB ($${\color{red}+0.1\%}$$)
texture2dArray from typegpudata.ts	11.28 kB ($${\color{red}+0.1\%}$$)
textureCubeArray from typegpudata.ts	11.29 kB ($${\color{red}+0.1\%}$$)
textureMultisampled2d from typegpudata.ts	11.29 kB ($${\color{red}+0.1\%}$$)
discard from typegpustd.ts	12.02 kB ($${\color{red}+0.1\%}$$)
arrayLength from typegpustd.ts	12.26 kB ($${\color{red}+0.1\%}$$)
extensionEnabled from typegpustd.ts	12.36 kB ($${\color{red}+0.1\%}$$)
range from typegpustd.ts	12.63 kB ($${\color{red}+0.1\%}$$)
disarrayOf from typegpudata.ts	12.79 kB ($${\color{red}+0.1\%}$$)
dpdx from typegpustd.ts	12.86 kB ($${\color{red}+0.1\%}$$)
dpdxCoarse from typegpustd.ts	12.87 kB ($${\color{red}+0.1\%}$$)
dpdxFine from typegpustd.ts	12.87 kB ($${\color{red}+0.1\%}$$)
dpdyCoarse from typegpustd.ts	12.87 kB ($${\color{red}+0.1\%}$$)
dpdyFine from typegpustd.ts	12.87 kB ($${\color{red}+0.1\%}$$)
dpdy from typegpustd.ts	12.87 kB ($${\color{red}+0.1\%}$$)
fwidthCoarse from typegpustd.ts	12.87 kB ($${\color{red}+0.1\%}$$)
fwidthFine from typegpustd.ts	12.87 kB ($${\color{red}+0.1\%}$$)
fwidth from typegpustd.ts	12.87 kB ($${\color{red}+0.1\%}$$)
atomicLoad from typegpustd.ts	13.62 kB ($${\color{red}+0.1\%}$$)
atomicStore from typegpustd.ts	13.62 kB ($${\color{red}+0.1\%}$$)
textureBarrier from typegpustd.ts	13.62 kB ($${\color{red}+0.1\%}$$)
atomicAdd from typegpustd.ts	13.63 kB ($${\color{red}+0.1\%}$$)
atomicAnd from typegpustd.ts	13.63 kB ($${\color{red}+0.1\%}$$)
atomicMax from typegpustd.ts	13.63 kB ($${\color{red}+0.1\%}$$)
atomicMin from typegpustd.ts	13.63 kB ($${\color{red}+0.1\%}$$)
atomicOr from typegpustd.ts	13.63 kB ($${\color{red}+0.1\%}$$)
atomicSub from typegpustd.ts	13.63 kB ($${\color{red}+0.1\%}$$)
atomicXor from typegpustd.ts	13.63 kB ($${\color{red}+0.1\%}$$)
storageBarrier from typegpustd.ts	13.63 kB ($${\color{red}+0.1\%}$$)
workgroupBarrier from typegpustd.ts	13.63 kB ($${\color{red}+0.1\%}$$)
vec2b from typegpudata.ts	17.23 kB ($${\color{red}+0.1\%}$$)
vec2f from typegpudata.ts	17.23 kB ($${\color{red}+0.1\%}$$)
vec2h from typegpudata.ts	17.23 kB ($${\color{red}+0.1\%}$$)
vec2i from typegpudata.ts	17.23 kB ($${\color{red}+0.1\%}$$)
vec2u from typegpudata.ts	17.23 kB ($${\color{red}+0.1\%}$$)
vec3b from typegpudata.ts	17.23 kB ($${\color{red}+0.1\%}$$)
vec3f from typegpudata.ts	17.23 kB ($${\color{red}+0.1\%}$$)
vec3h from typegpudata.ts	17.23 kB ($${\color{red}+0.1\%}$$)
vec3i from typegpudata.ts	17.23 kB ($${\color{red}+0.1\%}$$)
vec3u from typegpudata.ts	17.23 kB ($${\color{red}+0.1\%}$$)
vec4b from typegpudata.ts	17.23 kB ($${\color{red}+0.1\%}$$)
vec4f from typegpudata.ts	17.23 kB ($${\color{red}+0.1\%}$$)
vec4h from typegpudata.ts	17.23 kB ($${\color{red}+0.1\%}$$)
vec4i from typegpudata.ts	17.23 kB ($${\color{red}+0.1\%}$$)
vec4u from typegpudata.ts	17.23 kB ($${\color{red}+0.1\%}$$)
formatToWGSLType from typegpudata.ts	18.71 kB ($${\color{red}+0.1\%}$$)
uint8 from typegpudata.ts	18.72 kB ($${\color{red}+0.1\%}$$)
float16 from typegpudata.ts	18.72 kB ($${\color{red}+0.1\%}$$)
float16x2 from typegpudata.ts	18.72 kB ($${\color{red}+0.1\%}$$)
float16x4 from typegpudata.ts	18.72 kB ($${\color{red}+0.1\%}$$)
float32 from typegpudata.ts	18.72 kB ($${\color{red}+0.1\%}$$)
float32x2 from typegpudata.ts	18.72 kB ($${\color{red}+0.1\%}$$)
float32x3 from typegpudata.ts	18.72 kB ($${\color{red}+0.1\%}$$)
float32x4 from typegpudata.ts	18.72 kB ($${\color{red}+0.1\%}$$)
sint16 from typegpudata.ts	18.72 kB ($${\color{red}+0.1\%}$$)
sint16x2 from typegpudata.ts	18.72 kB ($${\color{red}+0.1\%}$$)
sint16x4 from typegpudata.ts	18.72 kB ($${\color{red}+0.1\%}$$)
sint32 from typegpudata.ts	18.72 kB ($${\color{red}+0.1\%}$$)
sint32x2 from typegpudata.ts	18.72 kB ($${\color{red}+0.1\%}$$)
sint32x3 from typegpudata.ts	18.72 kB ($${\color{red}+0.1\%}$$)
sint32x4 from typegpudata.ts	18.72 kB ($${\color{red}+0.1\%}$$)
sint8 from typegpudata.ts	18.72 kB ($${\color{red}+0.1\%}$$)
sint8x2 from typegpudata.ts	18.72 kB ($${\color{red}+0.1\%}$$)
sint8x4 from typegpudata.ts	18.72 kB ($${\color{red}+0.1\%}$$)
snorm16 from typegpudata.ts	18.72 kB ($${\color{red}+0.1\%}$$)
snorm16x2 from typegpudata.ts	18.72 kB ($${\color{red}+0.1\%}$$)
snorm16x4 from typegpudata.ts	18.72 kB ($${\color{red}+0.1\%}$$)
snorm8 from typegpudata.ts	18.72 kB ($${\color{red}+0.1\%}$$)
snorm8x2 from typegpudata.ts	18.72 kB ($${\color{red}+0.1\%}$$)
snorm8x4 from typegpudata.ts	18.72 kB ($${\color{red}+0.1\%}$$)
uint16 from typegpudata.ts	18.72 kB ($${\color{red}+0.1\%}$$)
uint16x2 from typegpudata.ts	18.72 kB ($${\color{red}+0.1\%}$$)
uint16x4 from typegpudata.ts	18.72 kB ($${\color{red}+0.1\%}$$)
uint32 from typegpudata.ts	18.72 kB ($${\color{red}+0.1\%}$$)
uint32x2 from typegpudata.ts	18.72 kB ($${\color{red}+0.1\%}$$)
uint32x3 from typegpudata.ts	18.72 kB ($${\color{red}+0.1\%}$$)
uint32x4 from typegpudata.ts	18.72 kB ($${\color{red}+0.1\%}$$)
uint8x2 from typegpudata.ts	18.72 kB ($${\color{red}+0.1\%}$$)
uint8x4 from typegpudata.ts	18.72 kB ($${\color{red}+0.1\%}$$)
unorm10 10 10 2 from typegpudata.ts	18.72 kB ($${\color{red}+0.1\%}$$)
unorm16 from typegpudata.ts	18.72 kB ($${\color{red}+0.1\%}$$)
unorm16x2 from typegpudata.ts	18.72 kB ($${\color{red}+0.1\%}$$)
unorm16x4 from typegpudata.ts	18.72 kB ($${\color{red}+0.1\%}$$)
unorm8 from typegpudata.ts	18.72 kB ($${\color{red}+0.1\%}$$)
unorm8x2 from typegpudata.ts	18.72 kB ($${\color{red}+0.1\%}$$)
unorm8x4 bgra from typegpudata.ts	18.72 kB ($${\color{red}+0.1\%}$$)
unorm8x4 from typegpudata.ts	18.72 kB ($${\color{red}+0.1\%}$$)
packedFormats from typegpudata.ts	18.74 kB ($${\color{red}+0.1\%}$$)
isPackedData from typegpudata.ts	18.79 kB ($${\color{red}+0.1\%}$$)
alignmentOf from typegpudata.ts	19.76 kB ($${\color{red}+0.1\%}$$)
subgroupAdd from typegpustd.ts	21.79 kB ($${\color{red}+0.1\%}$$)
subgroupAll from typegpustd.ts	21.80 kB ($${\color{red}+0.1\%}$$)
subgroupAnd from typegpustd.ts	21.80 kB ($${\color{red}+0.1\%}$$)
subgroupAny from typegpustd.ts	21.80 kB ($${\color{red}+0.1\%}$$)
subgroupBallot from typegpustd.ts	21.80 kB ($${\color{red}+0.1\%}$$)
subgroupBroadcastFirst from typegpustd.ts	21.80 kB ($${\color{red}+0.1\%}$$)
subgroupBroadcast from typegpustd.ts	21.80 kB ($${\color{red}+0.1\%}$$)
subgroupElect from typegpustd.ts	21.80 kB ($${\color{red}+0.1\%}$$)
subgroupExclusiveAdd from typegpustd.ts	21.80 kB ($${\color{red}+0.1\%}$$)
subgroupExclusiveMul from typegpustd.ts	21.80 kB ($${\color{red}+0.1\%}$$)
subgroupInclusiveAdd from typegpustd.ts	21.80 kB ($${\color{red}+0.1\%}$$)
subgroupInclusiveMul from typegpustd.ts	21.80 kB ($${\color{red}+0.1\%}$$)
subgroupMax from typegpustd.ts	21.80 kB ($${\color{red}+0.1\%}$$)
subgroupMin from typegpustd.ts	21.80 kB ($${\color{red}+0.1\%}$$)
subgroupMul from typegpustd.ts	21.80 kB ($${\color{red}+0.1\%}$$)
subgroupOr from typegpustd.ts	21.80 kB ($${\color{red}+0.1\%}$$)
subgroupShuffleDown from typegpustd.ts	21.80 kB ($${\color{red}+0.1\%}$$)
subgroupShuffleUp from typegpustd.ts	21.80 kB ($${\color{red}+0.1\%}$$)
subgroupShuffleXor from typegpustd.ts	21.80 kB ($${\color{red}+0.1\%}$$)
subgroupShuffle from typegpustd.ts	21.80 kB ($${\color{red}+0.1\%}$$)
subgroupXor from typegpustd.ts	21.80 kB ($${\color{red}+0.1\%}$$)
isBuiltin from typegpudata.ts	22.49 kB ($${\color{red}+0.1\%}$$)
dataImportOneDirect.ts	22.54 kB ($${\color{red}+0.1\%}$$)
dataImportOneStar.ts	22.54 kB ($${\color{red}+0.1\%}$$)
sizeOf from typegpudata.ts	22.54 kB ($${\color{red}+0.1\%}$$)
isContiguous from typegpudata.ts	22.54 kB ($${\color{red}+0.1\%}$$)
getLongestContiguousPrefix from typegpudata.ts	22.56 kB ($${\color{red}+0.1\%}$$)
textureDimensions from typegpustd.ts	23.55 kB ($${\color{red}+0.1\%}$$)
textureGather from typegpustd.ts	23.55 kB ($${\color{red}+0.1\%}$$)
textureLoad from typegpustd.ts	23.55 kB ($${\color{red}+0.1\%}$$)
textureSampleBaseClampToEdge from typegpustd.ts	23.55 kB ($${\color{red}+0.1\%}$$)
textureSampleBias from typegpustd.ts	23.55 kB ($${\color{red}+0.1\%}$$)
textureSampleCompareLevel from typegpustd.ts	23.55 kB ($${\color{red}+0.1\%}$$)
textureSampleCompare from typegpustd.ts	23.55 kB ($${\color{red}+0.1\%}$$)
textureSampleGrad from typegpustd.ts	23.55 kB ($${\color{red}+0.1\%}$$)
textureSampleLevel from typegpustd.ts	23.55 kB ($${\color{red}+0.1\%}$$)
textureSample from typegpustd.ts	23.55 kB ($${\color{red}+0.1\%}$$)
textureStore from typegpustd.ts	23.55 kB ($${\color{red}+0.1\%}$$)
arrayOf from typegpudata.ts	24.03 kB ($${\color{red}+0.1\%}$$)
size from typegpudata.ts	24.22 kB ($${\color{red}+0.1\%}$$)
align from typegpudata.ts	24.23 kB ($${\color{red}+0.1\%}$$)
location from typegpudata.ts	24.23 kB ($${\color{red}+0.1\%}$$)
interpolate from typegpudata.ts	24.23 kB ($${\color{red}+0.1\%}$$)
invariant from typegpudata.ts	24.60 kB ($${\color{red}+0.1\%}$$)
mat4x4f from typegpudata.ts	24.75 kB ($${\color{red}+0.1\%}$$)
identity2 from typegpustd.ts	24.75 kB ($${\color{red}+0.1\%}$$)
identity3 from typegpustd.ts	24.75 kB ($${\color{red}+0.1\%}$$)
identity4 from typegpustd.ts	24.75 kB ($${\color{red}+0.1\%}$$)
mat2x2f from typegpudata.ts	24.75 kB ($${\color{red}+0.1\%}$$)
mat3x3f from typegpudata.ts	24.75 kB ($${\color{red}+0.1\%}$$)
rotationX4 from typegpustd.ts	24.75 kB ($${\color{red}+0.1\%}$$)
rotationY4 from typegpustd.ts	24.75 kB ($${\color{red}+0.1\%}$$)
rotationZ4 from typegpustd.ts	24.75 kB ($${\color{red}+0.1\%}$$)
scaling4 from typegpustd.ts	24.75 kB ($${\color{red}+0.1\%}$$)
translation4 from typegpustd.ts	24.75 kB ($${\color{red}+0.1\%}$$)
matToArray from typegpudata.ts	24.88 kB ($${\color{red}+0.1\%}$$)
builtin from typegpudata.ts	26.40 kB ($${\color{red}+0.1\%}$$)
pack2x16float from typegpustd.ts	33.75 kB ($${\color{red}+0.0\%}$$)
pack4x8unorm from typegpustd.ts	33.75 kB ($${\color{red}+0.0\%}$$)
unpack2x16float from typegpustd.ts	33.75 kB ($${\color{red}+0.0\%}$$)
unpack4x8unorm from typegpustd.ts	33.75 kB ($${\color{red}+0.0\%}$$)
memoryLayoutOf from typegpudata.ts	39.86 kB ($${\color{red}+0.0\%}$$)
bitcastU32toF32 from typegpustd.ts	41.94 kB ($${\color{red}+0.0\%}$$)
bitcastU32toI32 from typegpustd.ts	41.95 kB ($${\color{red}+0.0\%}$$)
neg from typegpustd.ts	46.11 kB ($${\color{red}+0.0\%}$$)
add from typegpustd.ts	46.12 kB ($${\color{red}+0.0\%}$$)
bitShiftLeft from typegpustd.ts	46.12 kB ($${\color{red}+0.0\%}$$)
bitShiftRight from typegpustd.ts	46.12 kB ($${\color{red}+0.0\%}$$)
div from typegpustd.ts	46.12 kB ($${\color{red}+0.0\%}$$)
mod from typegpustd.ts	46.12 kB ($${\color{red}+0.0\%}$$)
mul from typegpustd.ts	46.12 kB ($${\color{red}+0.0\%}$$)
sub from typegpustd.ts	46.12 kB ($${\color{red}+0.0\%}$$)
stdImportOneDirect.ts	46.12 kB ($${\color{red}+0.0\%}$$)
stdImportOneStar.ts	46.12 kB ($${\color{red}+0.0\%}$$)
rotateX4 from typegpustd.ts	46.88 kB ($${\color{red}+0.0\%}$$)
scale4 from typegpustd.ts	46.88 kB ($${\color{red}+0.0\%}$$)
translate4 from typegpustd.ts	46.88 kB ($${\color{red}+0.0\%}$$)
rotateY4 from typegpustd.ts	46.88 kB ($${\color{red}+0.0\%}$$)
rotateZ4 from typegpustd.ts	46.88 kB ($${\color{red}+0.0\%}$$)
and from typegpustd.ts	49.06 kB ($${\color{red}+0.0\%}$$)
or from typegpustd.ts	49.06 kB ($${\color{red}+0.0\%}$$)
allEq from typegpustd.ts	49.06 kB ($${\color{red}+0.0\%}$$)
all from typegpustd.ts	49.06 kB ($${\color{red}+0.0\%}$$)
eq from typegpustd.ts	49.06 kB ($${\color{red}+0.0\%}$$)
lt from typegpustd.ts	49.06 kB ($${\color{red}+0.0\%}$$)
ne from typegpustd.ts	49.06 kB ($${\color{red}+0.0\%}$$)
not from typegpustd.ts	49.06 kB ($${\color{red}+0.0\%}$$)
any from typegpustd.ts	49.07 kB ($${\color{red}+0.0\%}$$)
ge from typegpustd.ts	49.07 kB ($${\color{red}+0.0\%}$$)
gt from typegpustd.ts	49.07 kB ($${\color{red}+0.0\%}$$)
isCloseTo from typegpustd.ts	49.07 kB ($${\color{red}+0.0\%}$$)
le from typegpustd.ts	49.07 kB ($${\color{red}+0.0\%}$$)
select from typegpustd.ts	49.07 kB ($${\color{red}+0.0\%}$$)
common from typegpu.ts	55.46 kB ($${\color{red}+0.0\%}$$)
isUsableAsUniform from typegpu.ts	60.37 kB ($${\color{red}+0.0\%}$$)
isTexture from typegpu.ts	60.38 kB ($${\color{red}+0.0\%}$$)
isSampler from typegpu.ts	60.38 kB ($${\color{red}+0.0\%}$$)
isComparisonSampler from typegpu.ts	60.39 kB ($${\color{red}+0.0\%}$$)
isVariable from typegpu.ts	62.19 kB ($${\color{red}+0.0\%}$$)
dot from typegpustd.ts	63.42 kB ($${\color{red}+0.0\%}$$)
length from typegpustd.ts	63.42 kB ($${\color{red}+0.0\%}$$)
distance from typegpustd.ts	63.42 kB ($${\color{red}+0.0\%}$$)
dot4U8Packed from typegpustd.ts	63.42 kB ($${\color{red}+0.0\%}$$)
fract from typegpustd.ts	63.42 kB ($${\color{red}+0.0\%}$$)
frexp from typegpustd.ts	63.42 kB ($${\color{red}+0.0\%}$$)
mix from typegpustd.ts	63.42 kB ($${\color{red}+0.0\%}$$)
modf from typegpustd.ts	63.42 kB ($${\color{red}+0.0\%}$$)
abs from typegpustd.ts	63.43 kB ($${\color{red}+0.0\%}$$)
acos from typegpustd.ts	63.43 kB ($${\color{red}+0.0\%}$$)
acosh from typegpustd.ts	63.43 kB ($${\color{red}+0.0\%}$$)
asin from typegpustd.ts	63.43 kB ($${\color{red}+0.0\%}$$)
asinh from typegpustd.ts	63.43 kB ($${\color{red}+0.0\%}$$)
atan2 from typegpustd.ts	63.43 kB ($${\color{red}+0.0\%}$$)
atan from typegpustd.ts	63.43 kB ($${\color{red}+0.0\%}$$)
atanh from typegpustd.ts	63.43 kB ($${\color{red}+0.0\%}$$)
ceil from typegpustd.ts	63.43 kB ($${\color{red}+0.0\%}$$)
clamp from typegpustd.ts	63.43 kB ($${\color{red}+0.0\%}$$)
cos from typegpustd.ts	63.43 kB ($${\color{red}+0.0\%}$$)
cosh from typegpustd.ts	63.43 kB ($${\color{red}+0.0\%}$$)
countLeadingZeros from typegpustd.ts	63.43 kB ($${\color{red}+0.0\%}$$)
countOneBits from typegpustd.ts	63.43 kB ($${\color{red}+0.0\%}$$)
countTrailingZeros from typegpustd.ts	63.43 kB ($${\color{red}+0.0\%}$$)
cross from typegpustd.ts	63.43 kB ($${\color{red}+0.0\%}$$)
degrees from typegpustd.ts	63.43 kB ($${\color{red}+0.0\%}$$)
determinant from typegpustd.ts	63.43 kB ($${\color{red}+0.0\%}$$)
dot4I8Packed from typegpustd.ts	63.43 kB ($${\color{red}+0.0\%}$$)
exp2 from typegpustd.ts	63.43 kB ($${\color{red}+0.0\%}$$)
exp from typegpustd.ts	63.43 kB ($${\color{red}+0.0\%}$$)
extractBits from typegpustd.ts	63.43 kB ($${\color{red}+0.0\%}$$)
faceForward from typegpustd.ts	63.43 kB ($${\color{red}+0.0\%}$$)
firstLeadingBit from typegpustd.ts	63.43 kB ($${\color{red}+0.0\%}$$)
firstTrailingBit from typegpustd.ts	63.43 kB ($${\color{red}+0.0\%}$$)
floor from typegpustd.ts	63.43 kB ($${\color{red}+0.0\%}$$)
fma from typegpustd.ts	63.43 kB ($${\color{red}+0.0\%}$$)
insertBits from typegpustd.ts	63.43 kB ($${\color{red}+0.0\%}$$)
inverseSqrt from typegpustd.ts	63.43 kB ($${\color{red}+0.0\%}$$)
ldexp from typegpustd.ts	63.43 kB ($${\color{red}+0.0\%}$$)
log2 from typegpustd.ts	63.43 kB ($${\color{red}+0.0\%}$$)
log from typegpustd.ts	63.43 kB ($${\color{red}+0.0\%}$$)
max from typegpustd.ts	63.43 kB ($${\color{red}+0.0\%}$$)
min from typegpustd.ts	63.43 kB ($${\color{red}+0.0\%}$$)
normalize from typegpustd.ts	63.43 kB ($${\color{red}+0.0\%}$$)
pow from typegpustd.ts	63.43 kB ($${\color{red}+0.0\%}$$)
quantizeToF16 from typegpustd.ts	63.43 kB ($${\color{red}+0.0\%}$$)
radians from typegpustd.ts	63.43 kB ($${\color{red}+0.0\%}$$)
reflect from typegpustd.ts	63.43 kB ($${\color{red}+0.0\%}$$)
refract from typegpustd.ts	63.43 kB ($${\color{red}+0.0\%}$$)
reverseBits from typegpustd.ts	63.43 kB ($${\color{red}+0.0\%}$$)
round from typegpustd.ts	63.43 kB ($${\color{red}+0.0\%}$$)
saturate from typegpustd.ts	63.43 kB ($${\color{red}+0.0\%}$$)
sign from typegpustd.ts	63.43 kB ($${\color{red}+0.0\%}$$)
sin from typegpustd.ts	63.43 kB ($${\color{red}+0.0\%}$$)
sinh from typegpustd.ts	63.43 kB ($${\color{red}+0.0\%}$$)
smoothstep from typegpustd.ts	63.43 kB ($${\color{red}+0.0\%}$$)
sqrt from typegpustd.ts	63.43 kB ($${\color{red}+0.0\%}$$)
step from typegpustd.ts	63.43 kB ($${\color{red}+0.0\%}$$)
tan from typegpustd.ts	63.43 kB ($${\color{red}+0.0\%}$$)
tanh from typegpustd.ts	63.43 kB ($${\color{red}+0.0\%}$$)
transpose from typegpustd.ts	63.43 kB ($${\color{red}+0.0\%}$$)
trunc from typegpustd.ts	63.43 kB ($${\color{red}+0.0\%}$$)
d from typegpu.ts	84.67 kB ($${\color{red}+0.0\%}$$)
isUsableAsVertex from typegpu.ts	85.94 kB ($${\color{red}+0.0\%}$$)
isBuffer from typegpu.ts	85.95 kB ($${\color{red}+0.0\%}$$)
dataImportEverything.ts	86.97 kB ($${\color{red}+0.0\%}$$)
std from typegpu.ts	99.58 kB ($${\color{red}+0.0\%}$$)
stdImportEverything.ts	102.35 kB ($${\color{red}+0.0\%}$$)
functionWithUseGpu.ts	282 B (➖)
functionWithoutUseGpu.ts	24 B (➖)
MissingBindGroupsError from typegpu.ts	1.34 kB (➖)
MissingLinksError from typegpu.ts	201 B (➖)
MissingSlotValueError from typegpu.ts	151 B (➖)
MissingVertexBuffersError from typegpu.ts	1.35 kB (➖)
NotUniformError from typegpu.ts	1.30 kB (➖)
ResolutionError from typegpu.ts	1.55 kB (➖)
ShaderGenerator from typegpu.ts	1.80 kB (➖)
Void from typegpudata.ts	734 B (➖)
atomic from typegpudata.ts	779 B (➖)
comparisonSampler from typegpudata.ts	753 B (➖)
deepEqual from typegpudata.ts	2.77 kB (➖)
isAccessor from typegpu.ts	65 B (➖)
isAlignAttrib from typegpudata.ts	755 B (➖)
isAtomic from typegpudata.ts	755 B (➖)
isBufferShorthand from typegpu.ts	1.81 kB (➖)
isBuiltinAttrib from typegpudata.ts	757 B (➖)
isData from typegpudata.ts	2.39 kB (➖)
isDecorated from typegpudata.ts	758 B (➖)
isDisarray from typegpudata.ts	1.69 kB (➖)
isInterpolateAttrib from typegpudata.ts	761 B (➖)
isLazy from typegpu.ts	61 B (➖)
isLocationAttrib from typegpudata.ts	758 B (➖)
isLooseData from typegpudata.ts	1.74 kB (➖)
isLooseDecorated from typegpudata.ts	1.70 kB (➖)
isMutableAccessor from typegpu.ts	73 B (➖)
isPtr from typegpudata.ts	752 B (➖)
isSizeAttrib from typegpudata.ts	754 B (➖)
isSlot from typegpu.ts	61 B (➖)
isTgpuComputeFn from typegpu.ts	69 B (➖)
isTgpuFn from typegpu.ts	765 B (➖)
isTgpuFragmentFn from typegpu.ts	70 B (➖)
isTgpuVertexFn from typegpu.ts	68 B (➖)
isUnstruct from typegpudata.ts	1.69 kB (➖)
isUsableAsRender from typegpu.ts	55 B (➖)
isUsableAsSampled from typegpu.ts	56 B (➖)
isUsableAsStorage from typegpu.ts	56 B (➖)
isWgslArray from typegpudata.ts	754 B (➖)
isWgslData from typegpudata.ts	1.31 kB (➖)
isWgslStruct from typegpudata.ts	755 B (➖)
ptrFn from typegpudata.ts	859 B (➖)
ptrHandle from typegpudata.ts	851 B (➖)
ptrPrivate from typegpudata.ts	858 B (➖)
ptrStorage from typegpudata.ts	856 B (➖)
ptrUniform from typegpudata.ts	852 B (➖)
ptrWorkgroup from typegpudata.ts	860 B (➖)
ref from typegpudata.ts	4.18 kB (➖)
sampler from typegpudata.ts	742 B (➖)
struct from typegpudata.ts	3.37 kB (➖)
textureExternal from typegpudata.ts	873 B (➖)
textureStorage1d from typegpudata.ts	1.01 kB (➖)
textureStorage2dArray from typegpudata.ts	1.03 kB (➖)
textureStorage2d from typegpudata.ts	1.01 kB (➖)
textureStorage3d from typegpudata.ts	1.01 kB (➖)
unstruct from typegpudata.ts	1.65 kB (➖)

If you wish to run a comparison for other, slower bundlers, run the 'Tree-shake test' from the GitHub Actions menu.

…at/mutability-tracking

github-actions · 2026-04-17T12:39:59Z

Resolution Time Benchmark

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…at/mutability-tracking

cieplypolar · 2026-04-17T18:47:36Z

+    if (targetType === snippet.dataType) {
+      return snippet;
+    }
+
    return snip(
      snippet.value,
      targetType,
      // if it was a ref, then it's still a ref
      /* origin */ snippet.origin,
    );


Suggested change

return snippet;

I know that I wrote this fragment of code, but now I think this check in unnecessary.

I don't understand, what can be simplified? Action 'none' does not mean return as-is, but it also replaces the dataType with targetType

Copilot

Pull request overview

Implements function-scope mutability tracking so the WGSL generator can emit let for locals that are never mutated, while still emitting var when mutation is detected (closing #2356).

Changes:

Add per-function placeholder + “modified variables” tracking to defer choosing let vs var until after the function body is generated.
Mark variables as modified on assignment/update operations and in select reference-taking cases (ref, unroll, implicit pointer creation).
Update a large set of inline-snapshot tests to reflect var → let where no mutation occurs.

Reviewed changes

Copilot reviewed 78 out of 78 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
packages/typegpu/src/types.ts	Extends `FunctionScopeLayer` with placeholder + modified-variable tracking.
packages/typegpu/src/resolutionCtx.ts	Initializes new function-scope tracking structures when pushing a function scope.
packages/typegpu/src/tgsl/wgslGenerator.ts	Core implementation: emit placeholder decls, track mutations, and replace placeholders with `let`/`var` at function end.
packages/typegpu/src/tgsl/conversion.ts	Minor optimization: preserve snippet when no-op conversion targets the same type.
packages/typegpu/tests/vector.test.ts	Snapshot updates for `var` → `let`.
packages/typegpu/tests/unroll.test.ts	Snapshot updates for `var` → `let`.
packages/typegpu/tests/tgslFn.test.ts	Snapshot updates for `var` → `let`.
packages/typegpu/tests/tgsl/wgslGenerator.test.ts	Snapshot updates for `var` → `let`.
packages/typegpu/tests/tgsl/typeInference.test.ts	Snapshot updates for `var` → `let`.
packages/typegpu/tests/tgsl/operatorOverloads.test.ts	Snapshot updates for `var` → `let`.
packages/typegpu/tests/tgsl/infixOperators.test.ts	Snapshot updates for `var` → `let`.
packages/typegpu/tests/tgsl/consoleLog.test.ts	Snapshot updates for `var` → `let`.
packages/typegpu/tests/tgsl/codeGen.test.ts	Snapshot updates for `var` → `let`.
packages/typegpu/tests/struct.test.ts	Snapshot updates for `var` → `let`.
packages/typegpu/tests/std/texture/textureLoad.test.ts	Snapshot updates for `var` → `let`.
packages/typegpu/tests/std/texture/textureGather.test.ts	Snapshot updates for `var` → `let`.
packages/typegpu/tests/std/range.test.ts	Snapshot updates for `var` → `let`.
packages/typegpu/tests/std/numeric/bitShift.test.ts	Snapshot updates for `var` → `let`.
packages/typegpu/tests/std/matrix/translate.test.ts	Snapshot updates for `var` → `let`.
packages/typegpu/tests/std/matrix/scale.test.ts	Snapshot updates for `var` → `let`.
packages/typegpu/tests/std/matrix/rotate.test.ts	Snapshot updates for `var` → `let`.
packages/typegpu/tests/std/boolean/not.test.ts	Snapshot updates for `var` → `let`.
packages/typegpu/tests/slot.test.ts	Snapshot updates for `var` → `let`.
packages/typegpu/tests/renderPipeline.test.ts	Snapshot updates for `var` → `let`.
packages/typegpu/tests/pipeline-resolution.test.ts	Snapshot updates for `var` → `let`.
packages/typegpu/tests/lazy.test.ts	Snapshot updates for `var` → `let`.
packages/typegpu/tests/indent.test.ts	Snapshot updates for `var` → `let`.
packages/typegpu/tests/computePipeline.test.ts	Snapshot updates for `var` → `let`.
packages/typegpu/tests/array.test.ts	Snapshot updates for `var` → `let`.
packages/typegpu/tests/accessor.test.ts	Snapshot updates for `var` → `let`.
apps/typegpu-docs/tests/individual-example-tests/xor-dev-runner.test.ts	Snapshot updates for `var` → `let`.
apps/typegpu-docs/tests/individual-example-tests/xor-dev-centrifuge-2.test.ts	Snapshot updates for `var` → `let`.
apps/typegpu-docs/tests/individual-example-tests/wgsl-resolution.test.ts	Snapshot updates for `var` → `let`.
apps/typegpu-docs/tests/individual-example-tests/vaporrave.test.ts	Snapshot updates for `var` → `let`.
apps/typegpu-docs/tests/individual-example-tests/uniformity.test.ts	Snapshot updates for `var` → `let`.
apps/typegpu-docs/tests/individual-example-tests/two-boxes.test.ts	Snapshot updates for `var` → `let`.
apps/typegpu-docs/tests/individual-example-tests/tgsl-parsing-test.test.ts	Snapshot updates for `var` → `let`.
apps/typegpu-docs/tests/individual-example-tests/stencil.test.ts	Snapshot updates for `var` → `let`.
apps/typegpu-docs/tests/individual-example-tests/stable-fluid.test.ts	Snapshot updates for `var` → `let`.
apps/typegpu-docs/tests/individual-example-tests/square.test.ts	Snapshot updates for `var` → `let`.
apps/typegpu-docs/tests/individual-example-tests/smoky-triangle.test.ts	Snapshot updates for `var` → `let`.
apps/typegpu-docs/tests/individual-example-tests/slime-mold.test.ts	Snapshot updates for `var` → `let`.
apps/typegpu-docs/tests/individual-example-tests/slime-mold-3d.test.ts	Snapshot updates for `var` → `let`.
apps/typegpu-docs/tests/individual-example-tests/simple-shadow.test.ts	Snapshot updates for `var` → `let`.
apps/typegpu-docs/tests/individual-example-tests/ray-marching.test.ts	Snapshot updates for `var` → `let`.
apps/typegpu-docs/tests/individual-example-tests/probability.test.ts	Snapshot updates for `var` → `let`.
apps/typegpu-docs/tests/individual-example-tests/point-light-shadow.test.ts	Snapshot updates for `var` → `let`.
apps/typegpu-docs/tests/individual-example-tests/phong-reflection.test.ts	Snapshot updates for `var` → `let`.
apps/typegpu-docs/tests/individual-example-tests/perlin-noise.test.ts	Snapshot updates for `var` → `let`.
apps/typegpu-docs/tests/individual-example-tests/oklab.test.ts	Snapshot updates for `var` → `let`.
apps/typegpu-docs/tests/individual-example-tests/log-test.test.ts	Snapshot updates for `var` → `let`.
apps/typegpu-docs/tests/individual-example-tests/liquid-glass.test.ts	Snapshot updates for `var` → `let`.
apps/typegpu-docs/tests/individual-example-tests/lines-combinations.test.ts	Snapshot updates for `var` → `let`.
apps/typegpu-docs/tests/individual-example-tests/jump-flood-voronoi.test.ts	Snapshot updates for `var` → `let`.
apps/typegpu-docs/tests/individual-example-tests/jump-flood-distance.test.ts	Snapshot updates for `var` → `let`.
apps/typegpu-docs/tests/individual-example-tests/image-tuning.test.ts	Snapshot updates for `var` → `let`.
apps/typegpu-docs/tests/individual-example-tests/gravity.test.ts	Snapshot updates for `var` → `let`.
apps/typegpu-docs/tests/individual-example-tests/global-wind-map.test.ts	Snapshot updates for `var` → `let`.
apps/typegpu-docs/tests/individual-example-tests/game-of-life.test.ts	Snapshot updates for `var` → `let`.
apps/typegpu-docs/tests/individual-example-tests/function-visualizer.test.ts	Snapshot updates for `var` → `let`.
apps/typegpu-docs/tests/individual-example-tests/fluid-double-buffering.test.ts	Snapshot updates for `var` → `let`.
apps/typegpu-docs/tests/individual-example-tests/disco.test.ts	Snapshot updates for `var` → `let`.
apps/typegpu-docs/tests/individual-example-tests/cubemap-reflection.test.ts	Snapshot updates for `var` → `let`.
apps/typegpu-docs/tests/individual-example-tests/confetti.test.ts	Snapshot updates for `var` → `let`.
apps/typegpu-docs/tests/individual-example-tests/clouds.test.ts	Snapshot updates for `var` → `let`.
apps/typegpu-docs/tests/individual-example-tests/circles.test.ts	Snapshot updates for `var` → `let`.
apps/typegpu-docs/tests/individual-example-tests/chroma-keying.test.ts	Snapshot updates for `var` → `let`.
apps/typegpu-docs/tests/individual-example-tests/caustics.test.ts	Snapshot updates for `var` → `let`.
apps/typegpu-docs/tests/individual-example-tests/camera-thresholding.test.ts	Snapshot updates for `var` → `let`.
apps/typegpu-docs/tests/individual-example-tests/box-raytracing.test.ts	Snapshot updates for `var` → `let`.
apps/typegpu-docs/tests/individual-example-tests/boids.test.ts	Snapshot updates for `var` → `let`.
apps/typegpu-docs/tests/individual-example-tests/blur.test.ts	Snapshot updates for `var` → `let`.
apps/typegpu-docs/tests/individual-example-tests/ascii-filter.test.ts	Snapshot updates for `var` → `let`.
apps/typegpu-docs/tests/individual-example-tests/3d-fish.test.ts	Snapshot updates for `var` → `let`.

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aleksanderkatan · 2026-04-20T16:30:00Z

We should probably test atomics as well, atomic load takes address of its argument

edit: nvm, you cannot declare an atomic in a function

…at/mutability-tracking

iwoplaza and others added 15 commits April 11, 2026 20:53

fix: Improvement to argument usage tracking

1036589

refactor: Naming cleanup

d7926fa

impr(docs): Improve orbit camera to better behave on mouse scroll-whe…

4672769

…el (#2304) Fixes #2160 Co-authored-by: Matt Van Horn <455140+mvanhorn@users.noreply.github.com>

@typegpu/geometry Simplify variable width lines implementation (#1935)

74eaee6

Add some basic tests

f1da8b5

Add more tests

591298f

Add reference tests

8f27d44

Move snapshots higher in tests

08650b3

Add a stub of implementation

52f52c0

Mark assignments as modified

87e3cd4

Add more tests and handle update

d612682

Handle refs

613c3ee

Handle js references

bcb1735

Reorganize tests

a15476b

Add more tests

f073da4

aleksanderkatan changed the base branch from refactor/naming-cleanup to main April 17, 2026 12:21

aleksanderkatan linked an issue Apr 17, 2026 that may be closed by this pull request

feat: Mutability tracking for better let and const declarations #2356

Open

aleksanderkatan changed the base branch from main to refactor/naming-cleanup April 17, 2026 12:26

iwoplaza added 2 commits April 17, 2026 14:28

fix: Improvement to argument usage tracking

88dfb64

refactor: Naming cleanup

5b7b6eb

iwoplaza force-pushed the refactor/naming-cleanup branch from d7926fa to 5b7b6eb Compare April 17, 2026 12:29

Merge remote-tracking branch 'origin/refactor/naming-cleanup' into fe…

c1d59e7

…at/mutability-tracking

refactor: Naming cleanup

2afcfb8

iwoplaza force-pushed the refactor/naming-cleanup branch from 5b7b6eb to 2afcfb8 Compare April 17, 2026 12:42

aleksanderkatan and others added 3 commits April 17, 2026 14:44

Merge remote-tracking branch 'origin/refactor/naming-cleanup' into fe…

4617b16

…at/mutability-tracking

fix: Improvement to argument usage tracking

6a12e46

refactor: Naming cleanup

d5d4be5

iwoplaza force-pushed the refactor/naming-cleanup branch from 2afcfb8 to d5d4be5 Compare April 17, 2026 12:47

aleksanderkatan added 3 commits April 17, 2026 15:05

Update example tests

eb7008b

Merge remote-tracking branch 'origin/refactor/naming-cleanup' into fe…

de529ab

…at/mutability-tracking

Fix the weird unroll case (thx @cieplypolar)

baa830b

cieplypolar reviewed Apr 17, 2026

View reviewed changes

aleksanderkatan added 4 commits April 20, 2026 10:28

Update some tests

d0affe8

Add new tests

3aaf455

Handle two more edge cases

b032f6f

Optimize string replacement

acdca4f

aleksanderkatan requested a review from Copilot April 20, 2026 09:47

Copilot started reviewing on behalf of aleksanderkatan April 20, 2026 09:48 View session

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Comment thread packages/typegpu/src/tgsl/wgslGenerator.ts

Comment thread packages/typegpu/src/tgsl/wgslGenerator.ts

Review fixes

ec85ed1

aleksanderkatan marked this pull request as ready for review April 20, 2026 10:11

aleksanderkatan requested review from cieplypolar, iwoplaza and reczkok April 20, 2026 10:11

iwoplaza added 2 commits April 24, 2026 15:42

fix: Improvement to argument usage tracking

62a097d

refactor: Naming cleanup

8517cba

iwoplaza force-pushed the refactor/naming-cleanup branch from d5d4be5 to 8517cba Compare April 24, 2026 13:49

Merge remote-tracking branch 'origin/refactor/naming-cleanup' into fe…

45237b2

…at/mutability-tracking

iwoplaza force-pushed the refactor/naming-cleanup branch 2 times, most recently from 38fa09b to 6a935e5 Compare April 29, 2026 11:57

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feat: Mutability tracking#2390

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aleksanderkatan commented Apr 20, 2026 •

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