refactor: enhance ByteBuffer.get performance#25
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@gxcsoccer, thanks for your PR! By analyzing the history of the files in this pull request, we identified @fengmk2, @dead-horse and @pmq20 to be potential reviewers. |
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前后 benchmark 对比呢？ |
gxcsoccer
commented
May 10, 2017
| }; | ||
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| ByteBuffer.prototype.get = function (index, length) { | ||
| if (index instanceof Buffer || Array.isArray(index)) { // get (byte[] dst, int offset, int length) |
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这个判断比较耗时，把它挪到后面去，在 hessian.js 里大部分情况是 get() 或者 get(index)
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ping @fengmk2 |
dead-horse
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May 11, 2017
dead-horse
reviewed
May 11, 2017
lib/byte.js
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| this.checkArraySize(dst.length, offset, length); | ||
| this.checkForUnderflow(length); | ||
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| if (is.buffer(dst)) { |
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直接用 Buffer.isBuffer() 吧，就不需要引入 is-type-of 了
fengmk2
reviewed
May 11, 2017
| // old get() x 2,234,273 ops/sec ±1.45% (90 runs sampled) | ||
| // new get() x 24,872,342 ops/sec ±2.13% (89 runs sampled) | ||
| // old get(index) x 2,339,452 ops/sec ±0.81% (93 runs sampled) | ||
| // new get(index) x 25,533,534 ops/sec ±0.84% (100 runs sampled) |
fengmk2
approved these changes
May 11, 2017
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@gxcsoccer 去掉 is-type-of 的依赖，你自己合并发布新版本。 |
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👏 赞 没想到 |
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@fengmk2 加个权限 |
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@gxcsoccer done |
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+ byte@1.1.6 |
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调整一下 ByteBuffer.get 参数判断的顺序