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perf(es/lexer): Reduce allocation while lexing identifiers #9076

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merged 10 commits into from
Jun 18, 2024
Merged

perf(es/lexer): Reduce allocation while lexing identifiers #9076

merged 10 commits into from
Jun 18, 2024

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@kdy1 kdy1 commented Jun 18, 2024 •
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Description:

In the fast path, we don't even use the buffer.

Benchmarking es/lexer/cal-com
Benchmarking es/lexer/cal-com: Warming up for 3.0000 s
Benchmarking es/lexer/cal-com: Collecting 100 samples in estimated 5.5395 s (900 iterations)
Benchmarking es/lexer/cal-com: Analyzing
es/lexer/cal-com        time:   [6.1799 ms 6.2010 ms 6.2250 ms]
                        change: [-4.4027% -3.9504% -3.5372%] (p = 0.00 < 0.05)
                        Performance has improved.
Found 17 outliers among 100 measurements (17.00%)
  4 (4.00%) high mild
  13 (13.00%) high severe

@kdy1 kdy1 added this to the Planned milestone Jun 18, 2024
@kdy1 kdy1 self-assigned this Jun 18, 2024
kdy1
kdy1 commented Jun 18, 2024
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swc-bump:

  • swc_ecma_parser
  • swc_core

@kdy1 kdy1 marked this pull request as ready for review June 18, 2024 07:42
@kdy1 kdy1 requested a review from a team as a code owner June 18, 2024 07:42
@kdy1 kdy1 enabled auto-merge (squash) June 18, 2024 07:42
kodiakhq[bot]
kodiakhq bot previously approved these changes Jun 18, 2024
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@kdy1 kdy1 disabled auto-merge June 18, 2024 07:46
@kdy1 kdy1 mentioned this pull request Jun 18, 2024
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@kdy1 kdy1 enabled auto-merge (squash) June 18, 2024 08:13
kdy1 added a commit that referenced this pull request Jun 18, 2024
@kdy1
perf(es/lexer): Make lexing of string literals faster (#9077)
373bac5 
**Description:**

We don't need to push a character at a time. This profiling result does not include improvements from
#9076.

```
Benchmarking es/lexer/cal-com
es/lexer/cal-com        time:   [6.4555 ms 6.4936 ms 6.5368 ms]
```
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Automated review comment generated by auto-rebase script

@kdy1 kdy1 merged commit 69f00b8 into swc-project:main Jun 18, 2024
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@kdy1 kdy1 deleted the parser branch June 18, 2024 08:54
@kdy1 kdy1 modified the milestones: Planned, v1.6.3 Jun 19, 2024
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