Agniva De Sarker 07f0460737 runtime,syscall/js: reuse wasm memory DataView ... Currently, every call to mem() incurs a new DataView object. This was necessary because the wasm linear memory could grow at any time. Now, whenever the memory grows, we make a call to the front-end. This allows us to reuse the existing DataView object and create a new one only when the memory actually grows. This gives us a boost in performance during DOM operations, while incurring an extra trip to front-end when memory grows. However, since the GrowMemory calls are meant to decrease over the runtime of an application, this is a good tradeoff in the long run. The benchmarks have been tested inside a browser (Google Chrome 75.0.3770.90 (Official Build) (64-bit)). It is hard to get stable nos. for DOM operations since the jumps make the timing very unreliable. But overall, it shows a clear gain. name old time/op new time/op delta DOM 135µs ±26% 84µs ±10% -37.22% (p=0.000 n=10+9) Go1 benchmarks do not show any noticeable degradation: name old time/op new time/op delta BinaryTree17 22.5s ± 0% 22.5s ± 0% ~ (p=0.743 n=8+9) Fannkuch11 15.1s ± 0% 15.1s ± 0% +0.17% (p=0.000 n=9+9) FmtFprintfEmpty 324ns ± 1% 303ns ± 0% -6.64% (p=0.000 n=9+10) FmtFprintfString 535ns ± 1% 515ns ± 0% -3.85% (p=0.000 n=10+10) FmtFprintfInt 609ns ± 0% 589ns ± 0% -3.28% (p=0.000 n=10+10) FmtFprintfIntInt 938ns ± 0% 920ns ± 0% -1.92% (p=0.000 n=9+10) FmtFprintfPrefixedInt 950ns ± 0% 924ns ± 0% -2.72% (p=0.000 n=10+9) FmtFprintfFloat 1.41µs ± 1% 1.43µs ± 0% +1.01% (p=0.000 n=10+10) FmtManyArgs 3.66µs ± 1% 3.46µs ± 0% -5.43% (p=0.000 n=9+10) GobDecode 38.8ms ± 1% 37.8ms ± 0% -2.50% (p=0.000 n=10+8) GobEncode 26.3ms ± 1% 26.3ms ± 0% ~ (p=0.853 n=10+10) Gzip 1.16s ± 1% 1.16s ± 0% -0.37% (p=0.008 n=10+9) Gunzip 210ms ± 0% 208ms ± 1% -1.01% (p=0.000 n=10+10) JSONEncode 48.0ms ± 0% 48.1ms ± 1% +0.29% (p=0.019 n=9+9) JSONDecode 348ms ± 1% 326ms ± 1% -6.34% (p=0.000 n=10+10) Mandelbrot200 6.62ms ± 0% 6.64ms ± 0% +0.37% (p=0.000 n=7+9) GoParse 23.9ms ± 1% 24.7ms ± 1% +2.98% (p=0.000 n=9+9) RegexpMatchEasy0_32 555ns ± 0% 561ns ± 0% +1.10% (p=0.000 n=8+10) RegexpMatchEasy0_1K 3.94µs ± 1% 3.94µs ± 0% ~ (p=0.906 n=9+8) RegexpMatchEasy1_32 516ns ± 0% 524ns ± 0% +1.51% (p=0.000 n=9+10) RegexpMatchEasy1_1K 4.39µs ± 1% 4.40µs ± 1% ~ (p=0.171 n=10+10) RegexpMatchMedium_32 25.1ns ± 0% 25.5ns ± 0% +1.51% (p=0.000 n=9+8) RegexpMatchMedium_1K 196µs ± 0% 203µs ± 1% +3.23% (p=0.000 n=9+10) RegexpMatchHard_32 11.2µs ± 1% 11.6µs ± 1% +3.62% (p=0.000 n=10+10) RegexpMatchHard_1K 334µs ± 1% 348µs ± 1% +4.21% (p=0.000 n=9+10) Revcomp 2.39s ± 0% 2.41s ± 0% +0.78% (p=0.000 n=8+9) Template 385ms ± 1% 336ms ± 0% -12.61% (p=0.000 n=10+9) TimeParse 2.18µs ± 1% 2.18µs ± 1% ~ (p=0.424 n=10+10) TimeFormat 2.28µs ± 1% 2.22µs ± 1% -2.30% (p=0.000 n=10+10) name old speed new speed delta GobDecode 19.8MB/s ± 1% 20.3MB/s ± 0% +2.56% (p=0.000 n=10+8) GobEncode 29.1MB/s ± 1% 29.2MB/s ± 0% ~ (p=0.810 n=10+10) Gzip 16.7MB/s ± 1% 16.8MB/s ± 0% +0.37% (p=0.007 n=10+9) Gunzip 92.2MB/s ± 0% 93.2MB/s ± 1% +1.03% (p=0.000 n=10+10) JSONEncode 40.4MB/s ± 0% 40.3MB/s ± 1% -0.28% (p=0.025 n=9+9) JSONDecode 5.58MB/s ± 1% 5.96MB/s ± 1% +6.80% (p=0.000 n=10+10) GoParse 2.42MB/s ± 0% 2.35MB/s ± 1% -2.83% (p=0.000 n=8+9) RegexpMatchEasy0_32 57.7MB/s ± 0% 57.0MB/s ± 0% -1.09% (p=0.000 n=8+10) RegexpMatchEasy0_1K 260MB/s ± 1% 260MB/s ± 0% ~ (p=0.963 n=9+8) RegexpMatchEasy1_32 62.1MB/s ± 0% 61.1MB/s ± 0% -1.53% (p=0.000 n=10+10) RegexpMatchEasy1_1K 233MB/s ± 1% 233MB/s ± 1% ~ (p=0.190 n=10+10) RegexpMatchMedium_32 39.8MB/s ± 0% 39.1MB/s ± 1% -1.74% (p=0.000 n=9+10) RegexpMatchMedium_1K 5.21MB/s ± 0% 5.05MB/s ± 1% -3.09% (p=0.000 n=9+10) RegexpMatchHard_32 2.86MB/s ± 1% 2.76MB/s ± 1% -3.43% (p=0.000 n=10+10) RegexpMatchHard_1K 3.06MB/s ± 1% 2.94MB/s ± 1% -4.06% (p=0.000 n=9+10) Revcomp 106MB/s ± 0% 105MB/s ± 0% -0.77% (p=0.000 n=8+9) Template 5.04MB/s ± 1% 5.77MB/s ± 0% +14.48% (p=0.000 n=10+9) Updates #32591 Change-Id: Id567e14a788e359248b2129ef1cf0adc8cc4ab7f Reviewed-on: https://go-review.googlesource.com/c/go/+/183457 Run-TryBot: Agniva De Sarker <agniva.quicksilver@gmail.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Richard Musiol <neelance@gmail.com>		2019-08-28 05:11:20 +00:00
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go_js_wasm_exec
wasm_exec.html	misc/wasm: add mention of polyfill for Edge support	2018-10-02 17:25:11 +00:00
wasm_exec.js	runtime,syscall/js: reuse wasm memory DataView	2019-08-28 05:11:20 +00:00