Guide/Benchmark

    Benchmark

    Benchmarks compare SWC Next with SWC on the same inputs and iteration counts. Wall time and peak resident memory are shown side by side, relative to SWC.

    Rust parse

    SWC Nextswc-next@d5047c8c
    SWCswc_core@82.1.0
    Input
    Wall timevs SWC
    Peak memoryvs SWC
    typescript.js10 iterations per process
    157.2 ms(3.48× faster)
    547.5 ms
    34.6 MiB(0.39× memory)
    89.8 MiB
    effect-schema-ast.ts10 iterations per process
    4.3 ms(2.53× faster)
    10.9 ms
    3.3 MiB(0.60× memory)
    5.5 MiB
    Mean values; lower is better. Bar lengths share a scale within each metric in this group.
    Detailed statistics

    typescript.js

    200 runs per engine · 10 iterations per process · 20 warmup runs

    EngineMetricMean ± σMinMax
    swc-nextd5047c8cWall time157.2 ms ± 4.5 ms149.7 ms191.5 ms
    Peak memory34.6 MiB ± 0.0 MiB34.6 MiB34.7 MiB
    swc_core82.1.0Wall time547.5 ms ± 11.5 ms526.0 ms638.5 ms
    Peak memory89.8 MiB ± 0.1 MiB89.7 MiB90.8 MiB

    effect-schema-ast.ts

    200 runs per engine · 10 iterations per process · 20 warmup runs

    EngineMetricMean ± σMinMax
    swc-nextd5047c8cWall time4.3 ms ± 0.1 ms4.1 ms4.7 ms
    Peak memory3.3 MiB ± 0.0 MiB3.3 MiB3.3 MiB
    swc_core82.1.0Wall time10.9 ms ± 0.2 ms10.5 ms11.8 ms
    Peak memory5.5 MiB ± 0.0 MiB5.5 MiB5.6 MiB

    Isolated declaration

    SWC Nextswc-next@d5047c8c
    SWCswc_core@82.1.0
    Input
    Wall timevs SWC
    Peak memoryvs SWC
    hono-types.ts10 iterations per process
    8.1 ms(2.00× faster)
    16.2 ms
    4.9 MiB(0.75× memory)
    6.5 MiB
    Mean values; lower is better. Bar lengths share a scale within each metric in this group.
    Detailed statistics

    hono-types.ts

    200 runs per engine · 10 iterations per process · 20 warmup runs

    EngineMetricMean ± σMinMax
    swc-nextd5047c8cWall time8.1 ms ± 0.1 ms7.8 ms8.5 ms
    Peak memory4.9 MiB ± 0.0 MiB4.9 MiB4.9 MiB
    swc_core82.1.0Wall time16.2 ms ± 0.3 ms15.7 ms18.5 ms
    Peak memory6.5 MiB ± 0.0 MiB6.4 MiB6.6 MiB

    Type strip

    SWC Nextswc-next@d5047c8c
    SWCswc_ts_fast_strip@59.0.1
    Input
    Wall timevs SWC
    Peak memoryvs SWC
    effect-schema-ast.ts10 iterations per process
    5.1 ms(2.39× faster)
    12.2 ms
    3.8 MiB(0.61× memory)
    6.2 MiB
    Mean values; lower is better. Bar lengths share a scale within each metric in this group.
    Detailed statistics

    effect-schema-ast.ts

    200 runs per engine · 10 iterations per process · 20 warmup runs

    EngineMetricMean ± σMinMax
    swc-nextd5047c8cWall time5.1 ms ± 0.1 ms4.9 ms5.5 ms
    Peak memory3.8 MiB ± 0.0 MiB3.8 MiB3.8 MiB
    swc_ts_fast_strip59.0.1Wall time12.2 ms ± 0.2 ms11.8 ms13.1 ms
    Peak memory6.2 MiB ± 0.1 MiB6.1 MiB6.3 MiB

    JS parser

    SWC Next@swc-next/core@d5047c8c
    SWC@swc/core@1.15.46
    Input
    Wall timevs SWC
    Peak memoryvs SWC
    typescript.js19 parses per process
    1,733.8 ms(9.44× faster)
    16,375.2 ms
    1,114.1 MiB(0.43× memory)
    2,614.4 MiB
    effect-schema-ast.ts1,377 parses per process
    1,673.7 ms(7.97× faster)
    13,331.2 ms
    886.3 MiB(10.43× memory)
    85.0 MiB
    Mean values; lower is better. Bar lengths share a scale within each metric in this group.
    Detailed statistics

    typescript.js

    2 runs per engine · 19 parses per process + 1 validation + 5 warmups

    EngineMetricMean ± σMinMax
    @swc-next/cored5047c8cWall time1,733.8 ms ± 2.8 ms1,731.8 ms1,735.8 ms
    Peak memory1,114.1 MiB ± 8.1 MiB1,108.4 MiB1,119.9 MiB
    @swc/core1.15.46Wall time16,375.2 ms ± 173.7 ms16,252.4 ms16,498.0 ms
    Peak memory2,614.4 MiB ± 0.5 MiB2,614.1 MiB2,614.7 MiB

    effect-schema-ast.ts

    2 runs per engine · 1,377 parses per process + 1 validation + 5 warmups

    EngineMetricMean ± σMinMax
    @swc-next/cored5047c8cWall time1,673.7 ms ± 155.7 ms1,563.6 ms1,783.8 ms
    Peak memory886.3 MiB ± 13.1 MiB877.0 MiB895.5 MiB
    @swc/core1.15.46Wall time13,331.2 ms ± 71.9 ms13,280.3 ms13,382.1 ms
    Peak memory85.0 MiB ± 0.4 MiB84.7 MiB85.2 MiB