[Merged by Bors] - Direct array element access on ByValue instructions
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HalidOdat
added
performance
HalidOdat
requested review from
Razican,
jasonwilliams,
RageKnify,
raskad,
jedel1043 and
nekevss
Test262 conformance changes
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Codecov Report
@@ Coverage Diff @@
## main #2827 +/- ##
==========================================
+ Coverage 50.92% 50.97% +0.04%
==========================================
Files 419 419
Lines 41780 41837 +57
==========================================
+ Hits 21278 21326 +48
- Misses 20502 20511 +9
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jedel1043
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Apr 17, 2023
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To me this looks like it should be faster, but the "Array creation" benchmark seems to be slower in the ci. I checked it locally and also got a pretty consistent +12% on that one. Do you know why that may be @HalidOdat? |
😕 Yes, It's weird since the first benchmark had a EDIT: The problem is that this optimizes for access and set of pre-existing indexed properties, not creating new ones like in the benchmark: (function () {
let testArr = [];
for (let a = 0; a <= 500; a++) {
testArr[a] = "p" + a;
}
return testArr;
})();Will work on adding a fast path for this :) |
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Will fix the bug then mark this as ready for review :) |
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Apr 25, 2023
Most of the time that we have a `ByValue` ( `[ value ]` syntax ) it is for arrays and the value is usually an index. This PR adds a fast path to the instructions (without calling `.borrow()` on the object to check if its an array)
For example, this code:
```js
let a = [1, 2, 3]
for (let i = 0 ; i < 10000000; ++i) {
a[i % 3] += a[ (i + 1) % 3 ]
}
```
Using `hyperfine`, it ran `1.38` times faster on this PR.
```bash
Benchmark 1: ./boa_main test.js
Time (mean ± σ): 16.504 s ± 0.192 s [User: 16.440 s, System: 0.020 s]
Range (min … max): 16.328 s … 16.938 s 10 runs
Benchmark 2: ./boa_direct_array_access test.js
Time (mean ± σ): 11.982 s ± 0.038 s [User: 11.939 s, System: 0.013 s]
Range (min … max): 11.914 s … 12.035 s 10 runs
Summary
'./boa_direct_array_access test.js' ran
1.38 ± 0.02 times faster than './boa_main test.js'
```
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Pull request successfully merged into main. Build succeeded: |
bors
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ByValue instructionsByValue instructions
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Most of the time that we have a
ByValue([ value ]syntax ) it is for arrays and the value is usually an index. This PR adds a fast path to the instructions (without calling.borrow()on the object to check if its an array)For example, this code:
Using
hyperfine, it ran1.38times faster on this PR.