[Performance] Matrix 用 Float32Array 初始性能比 Array 高, 但量大后则不如Array

[deepkolos]

Describe the bug Matrix 用 Float32Array 初始性能比 Array 高, 但量大后则不如Array

To Reproduce Steps to reproduce the behavior:

复现仓库 https://github.com/deepkolos/matrix-f32-array-performace-issue/

复现地址 https://deepkolos.github.io/matrix-f32-array-performace-issue/

Desktop (please complete the following information):

• OS: Windows
• Browser Chrome
• Version 98

Additional context https://github.com/toji/gl-matrix/issues/359 https://github.com/akira-cn/babel-plugin-transform-gl-matrix/blob/master/README-CN.md

[singlecoder]

Describe the bug Matrix 用 Float32Array 初始性能比 Array 高, 但量大后则不如Array

To Reproduce Steps to reproduce the behavior:

复现仓库 https://github.com/deepkolos/matrix-f32-array-performace-issue/

复现地址 https://deepkolos.github.io/matrix-f32-array-performace-issue/

Desktop (please complete the following information):

• OS: Windows
• Browser Chrome
• Version 98

Additional context toji/gl-matrix#359 https://github.com/akira-cn/babel-plugin-transform-gl-matrix/blob/master/README-CN.md

先手动为实践点赞，测试很严谨，从 CPU 的角度来说，量大 Array 性能确实会比 Float32Array 快，作为引擎里面的数学库，我们除了从 CPU 的角度考虑外，还需要考虑 CPU 上传数据 (比如：矩阵的 uniform) 到 GPU 的开销，这部分差异很大 (相对来说 CPU 带来的性能差异就没有那么明显了)，综合下来看，采用 Float32Array 整体性能会更好～

[GuoLei1990]

Do a performance test between gl.uniformMatrix4fv( Float32Array) and gl.uniformMatrix4fv( Array<number>)