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graphics: Revive the special allocating method for vertices for Wasm

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It looks like the allocation cost is pretty high even on Wasm.
Revive the special method not only on GopherJS but also on Wasm.

examples/sprites kept 30FPS without this fix, but keeps 35FPS with
this fix, on Hajime's MacBook Pro 2020 (macOS Catalina 10.15.6).

Updates #797
This commit is contained in:
Hajime Hoshi 2020-09-21 04:19:26 +09:00
parent 8d17ec837a
commit cb73230301
1 changed files with 2 additions and 2 deletions
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4
internal/graphics/vertex.go
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@ -83,8 +83,8 @@ func (v *verticesBackend) slice(n int, last bool) []float32 {
} }
func vertexSlice(n int, last bool) []float32 { func vertexSlice(n int, last bool) []float32 {
if web.IsGopherJS() { if web.IsBrowser() {
// In GopherJS, allocating memory by make is expensive. Use the backend instead. // In GopherJS and Wasm, allocating memory by make is expensive. Use the backend instead.
return theVerticesBackend.slice(n, last) return theVerticesBackend.slice(n, last)
} }
return make([]float32, n*VertexFloatNum) return make([]float32, n*VertexFloatNum)