🧼 optimize wasm build with -Oz and wasm-opt

[natemoo-re]

Building on #35, reduces npm install size by ~27% (270 kB → 196 kB unpacked) via:

• switches clang from -O2 to -Oz (optimize for size over speed)
• adds a wasm-opt -Oz post-pass on the compiled binary, shrinking clayterm.wasm from 152 kB → 98 kB
• WASM_OPT is configurable via env var if the tool isn't in PATH (defaults to wasm-opt)

Trade-off: -Oz prioritizes size over speed; runtime performance impact is unknown. That's why we added benchmarks in #43.

[pkg-pr-new]

Open in StackBlitz

npm i https://pkg.pr.new/clayterm@47

commit: c3a2983

[codspeed-hq]

Merging this PR will degrade performance by 24.69%

❌ 5 regressed benchmarks
✅ 13 untouched benchmarks

Warning

Please fix the performance issues or acknowledge them on CodSpeed.

Performance Changes

	Benchmark	BASE	HEAD	Efficiency
❌	diff render (second frame)	712.2 µs	1,042.6 µs	-31.7%
❌	simple text	184 µs	255.9 µs	-28.09%
❌	bordered box with corner radius	223.3 µs	279.5 µs	-20.13%
❌	dashboard layout	437 µs	597.7 µs	-26.89%
❌	render with pointer hit testing	274.6 µs	325.1 µs	-15.53%

Tip

Investigate this regression by commenting @codspeedbot fix this regression on this PR, or directly use the CodSpeed MCP with your agent.

---

_{Comparing ref/wasm-opt (c3a2983) with main (4139212)}