perf(es/lexer): Use jump table for read_token

[kdy1]

Description:

[kdy1]

Performance:

Gnuplot not found, using plotters backend
Benchmarking es/parser/colors
Benchmarking es/parser/colors: Warming up for 3.0000 s
Benchmarking es/parser/colors: Collecting 100 samples in estimated 5.0033 s (384k iterations)
Benchmarking es/parser/colors: Analyzing
es/parser/colors        time:   [13.026 us 13.075 us 13.132 us]
                        change: [-15.119% -14.703% -14.309%] (p = 0.00 < 0.05)
                        Performance has improved.
Found 10 outliers among 100 measurements (10.00%)
  5 (5.00%) high mild
  5 (5.00%) high severe

Benchmarking es/parser/angular
Benchmarking es/parser/angular: Warming up for 3.0000 s
Benchmarking es/parser/angular: Collecting 100 samples in estimated 5.6217 s (800 iterations)
Benchmarking es/parser/angular: Analyzing
es/parser/angular       time:   [6.7509 ms 6.7717 ms 6.7953 ms]
                        change: [-12.015% -11.569% -11.099%] (p = 0.00 < 0.05)
                        Performance has improved.
Found 15 outliers among 100 measurements (15.00%)
  5 (5.00%) high mild
  10 (10.00%) high severe

Benchmarking es/parser/backbone
Benchmarking es/parser/backbone: Warming up for 3.0000 s
Benchmarking es/parser/backbone: Collecting 100 samples in estimated 9.5340 s (10k iterations)
Benchmarking es/parser/backbone: Analyzing
es/parser/backbone      time:   [935.23 us 937.56 us 940.28 us]
                        change: [-15.091% -14.500% -13.887%] (p = 0.00 < 0.05)
                        Performance has improved.
Found 12 outliers among 100 measurements (12.00%)
  7 (7.00%) high mild
  5 (5.00%) high severe

Benchmarking es/parser/jquery
Benchmarking es/parser/jquery: Warming up for 3.0000 s
Benchmarking es/parser/jquery: Collecting 100 samples in estimated 5.2870 s (1000 iterations)
Benchmarking es/parser/jquery: Analyzing
es/parser/jquery        time:   [5.1629 ms 5.1778 ms 5.1942 ms]
                        change: [-15.079% -14.616% -14.187%] (p = 0.00 < 0.05)
                        Performance has improved.
Found 10 outliers among 100 measurements (10.00%)
  5 (5.00%) high mild
  5 (5.00%) high severe

Benchmarking es/parser/jquery mobile
Benchmarking es/parser/jquery mobile: Warming up for 3.0000 s
Benchmarking es/parser/jquery mobile: Collecting 100 samples in estimated 5.6964 s (700 iterations)
Benchmarking es/parser/jquery mobile: Analyzing
es/parser/jquery mobile time:   [7.8998 ms 7.9282 ms 7.9596 ms]
                        change: [-15.675% -15.200% -14.724%] (p = 0.00 < 0.05)
                        Performance has improved.
Found 10 outliers among 100 measurements (10.00%)
  8 (8.00%) high mild
  2 (2.00%) high severe

Benchmarking es/parser/mootools
Benchmarking es/parser/mootools: Warming up for 3.0000 s
Benchmarking es/parser/mootools: Collecting 100 samples in estimated 5.2432 s (1300 iterations)
Benchmarking es/parser/mootools: Analyzing
es/parser/mootools      time:   [3.9448 ms 3.9585 ms 3.9740 ms]
                        change: [-17.959% -17.367% -16.806%] (p = 0.00 < 0.05)
                        Performance has improved.
Found 5 outliers among 100 measurements (5.00%)
  3 (3.00%) high mild
  2 (2.00%) high severe

Benchmarking es/parser/underscore
Benchmarking es/parser/underscore: Warming up for 3.0000 s
Benchmarking es/parser/underscore: Collecting 100 samples in estimated 8.0871 s (10k iterations)
Benchmarking es/parser/underscore: Analyzing
es/parser/underscore    time:   [786.80 us 788.70 us 790.90 us]
                        change: [-17.143% -16.540% -15.954%] (p = 0.00 < 0.05)
                        Performance has improved.
Found 11 outliers among 100 measurements (11.00%)
  6 (6.00%) high mild
  5 (5.00%) high severe

Benchmarking es/parser/three
Benchmarking es/parser/three: Warming up for 3.0000 s
Benchmarking es/parser/three: Collecting 100 samples in estimated 6.8072 s (300 iterations)
Benchmarking es/parser/three: Analyzing
es/parser/three         time:   [22.124 ms 22.186 ms 22.255 ms]
                        change: [-16.551% -16.003% -15.527%] (p = 0.00 < 0.05)
                        Performance has improved.
Found 15 outliers among 100 measurements (15.00%)
  5 (5.00%) high mild
  10 (10.00%) high severe

Benchmarking es/parser/yui
Benchmarking es/parser/yui: Warming up for 3.0000 s
Benchmarking es/parser/yui: Collecting 100 samples in estimated 5.2695 s (1300 iterations)
Benchmarking es/parser/yui: Analyzing
es/parser/yui           time:   [3.9702 ms 3.9818 ms 3.9949 ms]
                        change: [-13.089% -12.716% -12.333%] (p = 0.00 < 0.05)
                        Performance has improved.
Found 13 outliers among 100 measurements (13.00%)
  1 (1.00%) high mild
  12 (12.00%) high severe

[kdy1]

---

swc-bump:

• swc_ecma_parser

[DanaDane23]

Noted with thanks

…

On Sat, Mar 11, 2023, 5:09 AM kdy1 ***@***.***> wrote: *Description:* ------------------------------ You can view, comment on, or merge this pull request online at: #7058 Commit Summary - 2a4a390 <2a4a390> Add table.rs - b6a67b5 <b6a67b5> More table - 528344e <528344e> More - 48b3bd7 <48b3bd7> Unicode - a1092c8 <a1092c8> Error - f871e8b <f871e8b> More - 337b634 <337b634> IDT - 3fe7b64 <3fe7b64> More - 2b01bbb <2b01bbb> More - 803220c <803220c> More - 0a3345e <0a3345e> More - f3ae7b7 <f3ae7b7> ^ - a7071b4 <a7071b4> Refactor - 1648622 <1648622> Refactor: `read_token_bang_or_eq` - a37073e <a37073e> More table work - 9140d25 <9140d25> More table work - 057d3f6 <057d3f6> More table work - 5babd45 <5babd45> More table work - cd99346 <cd99346> Table work is done - b0b30e6 <b0b30e6> Fix lexer - dca6944 <dca6944> Fix table - c1a7852 <c1a7852> Use table - 32794e8 <32794e8> Fix table for `@` File Changes (2 files <https://github.com/swc-project/swc/pull/7058/files>) - *M* crates/swc_ecma_parser/src/lexer/mod.rs <https://github.com/swc-project/swc/pull/7058/files#diff-6402bc52db5ddbd503b09a01f2ab9ec09c93953a43f40d641aa0edfa83f0cf08> (254) - *A* crates/swc_ecma_parser/src/lexer/table.rs <https://github.com/swc-project/swc/pull/7058/files#diff-2b4b8a57576cff5f77307802f5134dd5bd022515882a796173a9318c8ee7a17f> (175) Patch Links: - https://github.com/swc-project/swc/pull/7058.patch - https://github.com/swc-project/swc/pull/7058.diff — Reply to this email directly, view it on GitHub <#7058>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/A6GG5XM6OI5RNFTYAYS5EDLW3RMPJANCNFSM6AAAAAAVXNRBEA> . You are receiving this because you are subscribed to this thread.Message ID: ***@***.***>

[strager]

I'm curious: Why didn't the Rust compiler make a switch table for this match?