49 lines
1.6 KiB
Markdown
49 lines
1.6 KiB
Markdown
# WASM Feasibility — Confirmed
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## Test Results
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All kobopatch tests pass under both native and WASM targets.
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### Native (`go test ./...`)
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```
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ok github.com/pgaskin/kobopatch/kobopatch 0.003s
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ok github.com/pgaskin/kobopatch/patchfile/kobopatch 0.003s
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ok github.com/pgaskin/kobopatch/patchfile/patch32lsb 0.002s
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ok github.com/pgaskin/kobopatch/patchlib 0.796s
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```
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### WASM (`GOOS=js GOARCH=wasm`, run via Node.js)
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```
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ok github.com/pgaskin/kobopatch/kobopatch 0.158s
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ok github.com/pgaskin/kobopatch/patchfile/kobopatch 0.162s
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ok github.com/pgaskin/kobopatch/patchfile/patch32lsb 0.133s
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ok github.com/pgaskin/kobopatch/patchlib 9.755s
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```
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### Notes
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- `patchlib` tests are ~12x slower under WASM (9.7s vs 0.8s) — expected overhead
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- All pure Go dependencies compile to WASM without issues
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- No CGO, no OS-specific syscalls in the core libraries
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- Go WASM executor: `$(go env GOROOT)/lib/wasm/go_js_wasm_exec`
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- Node.js v25.8.1 used for WASM test execution
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## What Works in WASM
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- Binary patching (`patchlib`)
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- ARM Thumb-2 instruction assembly (`patchlib/asm`)
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- ELF symbol table parsing (`patchlib/syms`)
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- YAML patch format parsing (`patchfile/kobopatch`)
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- Binary patch format parsing (`patchfile/patch32lsb`)
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- CSS parsing (`patchlib/css`)
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- Zlib compression/decompression
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- tar.gz reading/writing
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- ZIP extraction
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## What Won't Work in WASM (and doesn't need to)
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- `os.Open` / `os.Create` — replace with in-memory I/O
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- `os.Chdir` — not needed, use in-memory paths
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- `exec.Command` (lrelease for translations) — skip, rare use case
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- `ioutil.TempDir` — not needed with in-memory approach
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