Replace most ID usage with pointers by jakebailey · Pull Request #3362 · microsoft/typescript-go

jakebailey · 2026-04-08T17:46:44Z

We don't need IDs for comparability in Go; we can use the pointer in pretty much all cases, saving loads.

jakebailey · 2026-04-08T17:46:59Z

typescript-bot · 2026-04-08T17:47:04Z

Starting jobs; this comment will be updated as builds start and complete.

Command	Status	Results
`perf test this faster`	✅ Started	👀 Results

typescript-bot · 2026-04-08T18:13:05Z

@jakebailey
The results of the perf run you requested are in!

Here they are:

tsc

Comparison Report - baseline..pr

_Metric	_baseline	_pr	_Delta	_Best	_Worst	_p-value
_{Compiler-Unions - native}
_Errors	₄	₄	_~	_~	_~	_{p=1.000 n=6}
_Symbols	_{81,815 (± 0.02%)}	_{81,804 (± 0.02%)}	_~	_81,781	_81,827	_{p=0.332 n=6}
_Types	_98,821	_98,821	_~	_~	_~	_{p=1.000 n=6}
_{Memory Used}	_{174,707k (± 0.03%)}	_{174,816k (± 0.06%)}	_{+109k (+ 0.06%)}	_174,712k	_175,005k	_{p=0.031 n=6}
_{Memory Allocs}	_{1,771,567 (± 0.02%)}	_{1,762,352 (± 0.02%)}	_{-9,215 (- 0.52%)}	_1,761,825	_1,762,807	_{p=0.005 n=6}
_{Config Time}	_0.000s	_0.000s	_~	_~	_~	_{p=1.000 n=6}
_{Parse Time}	_{0.059s (± 5.50%)}	_{0.059s (± 6.44%)}	_~	_0.055s	_0.064s	_{p=0.935 n=6}
_{Bind Time}	_0s	_0s	_~	_~	_~	_{p=1.000 n=6}
_{Check Time}	_0s	_0s	_~	_~	_~	_{p=1.000 n=6}
_{Emit Time}	_{0.854s (± 0.62%)}	_{0.843s (± 1.41%)}	_~	_0.834s	_0.863s	_{p=0.173 n=6}
_{Total Time}	_{0.914s (± 0.74%)}	_{0.902s (± 1.71%)}	_~	_0.889s	_0.927s	_{p=0.229 n=6}
_{angular-1 - native}
_Errors	₂	₂	_~	_~	_~	_{p=1.000 n=6}
_Symbols	_{884,654 (± 0.12%)}	_{884,833 (± 0.07%)}	_~	_883,750	_885,449	_{p=1.000 n=6}
_Types	_{263,842 (± 0.00%)}	_{263,842 (± 0.00%)}	_~	_263,840	_263,845	_{p=0.654 n=6}
_{Memory Used}	_{835,729k (± 0.06%)}	_{836,217k (± 0.09%)}	_~	_835,042k	_837,532k	_{p=0.230 n=6}
_{Memory Allocs}	_{6,716,687 (± 0.23%)}	_{6,712,236 (± 0.11%)}	_~	_6,697,659	_6,717,634	_{p=0.689 n=6}
_{Config Time}	_{0.028s (± 2.70%)}	_{0.028s (± 3.04%)}	_~	_0.027s	_0.029s	_{p=0.432 n=6}
_{Parse Time}	_{0.246s (± 5.83%)}	_{0.241s (± 6.30%)}	_~	_0.218s	_0.259s	_{p=0.873 n=6}
_{Bind Time}	_0s	_0s	_~	_~	_~	_{p=1.000 n=6}
_{Check Time}	_0s	_0s	_~	_~	_~	_{p=1.000 n=6}
_{Emit Time}	_{1.896s (± 1.05%)}	_{1.917s (± 0.78%)}	_~	_1.893s	_1.935s	_{p=0.078 n=6}
_{Total Time}	_{2.172s (± 1.25%)}	_{2.188s (± 0.70%)}	_~	_2.167s	_2.209s	_{p=0.261 n=6}
_{mui-docs - native}
_Errors	₃	₃	_~	_~	_~	_{p=1.000 n=6}
_Symbols	_4,262,286	_4,262,286	_~	_~	_~	_{p=1.000 n=6}
_Types	_1,537,275	_1,537,275	_~	_~	_~	_{p=1.000 n=6}
_{Memory Used}	_{5,420,081k (± 0.04%)}	_{5,443,848k (± 0.07%)}	_{+23,767k (+ 0.44%)}	_5,439,652k	_5,448,579k	_{p=0.005 n=6}
_{Memory Allocs}	_{101,039,389 (±20.35%)}	_{96,925,070 (±15.78%)}	_~	_73,687,323	_110,824,668	_{p=0.936 n=6}
_{Config Time}	_{0.022s (± 3.39%)}	_{0.022s (± 2.38%)}	_~	_0.021s	_0.022s	_{p=0.241 n=6}
_{Parse Time}	_{1.135s (±33.33%)}	_{1.011s (±20.31%)}	_~	_0.688s	_1.249s	_{p=0.471 n=6}
_{Bind Time}	_0.002s	_0.002s	_~	_~	_~	_{p=1.000 n=6}
_{Check Time}	_{16.780s (± 0.23%)}	_{16.758s (± 0.36%)}	_~	_16.694s	_16.864s	_{p=0.298 n=6}
_{Emit Time}	_{0.508s (±28.39%)}	_{0.439s (± 3.94%)}	_~	_0.416s	_0.453s	_{p=0.297 n=6}
_{Total Time}	_{18.775s (± 1.74%)}	_{18.641s (± 1.33%)}	_~	_18.202s	_18.898s	_{p=0.873 n=6}
_{self-build-src - native}
_Errors	₀	₀	_~	_~	_~	_{p=1.000 n=6}
_Symbols	_1,396,619	_1,396,619	_~	_~	_~	_{p=1.000 n=6}
_Types	_442,163	_442,163	_~	_~	_~	_{p=1.000 n=6}
_{Memory Used}	_{1,634,649k (± 0.30%)}	_{1,633,877k (± 0.26%)}	_~	_1,625,447k	_1,636,915k	_{p=0.575 n=6}
_{Memory Allocs}	_{57,251,727 (± 0.13%)}	_{57,273,372 (± 0.09%)}	_~	_57,193,000	_57,328,680	_{p=0.810 n=6}
_{Config Time}	_{0.018s (±49.85%)}	_{0.014s (±58.23%)}	_~	_0.006s	_0.029s	_{p=0.470 n=6}
_{Parse Time}	_{0.278s (± 5.04%)}	_{0.278s (± 1.54%)}	_~	_0.273s	_0.285s	_{p=0.936 n=6}
_{Bind Time}	_0.000s	_0.000s	_~	_~	_~	_{p=1.000 n=6}
_{Check Time}	_{2.315s (± 1.22%)}	_{2.299s (± 0.69%)}	_~	_2.269s	_2.313s	_{p=0.298 n=6}
_{Emit Time}	_{0.224s (± 8.04%)}	_{0.220s (± 3.00%)}	_~	_0.208s	_0.225s	_{p=1.000 n=6}
_{Total Time}	_{29.639s (± 1.34%)}	_{29.478s (± 0.58%)}	_~	_29.257s	_29.699s	_{p=0.471 n=6}
_{self-compiler - native}
_Errors	₀	₀	_~	_~	_~	_{p=1.000 n=6}
_Symbols	_338,176	_338,176	_~	_~	_~	_{p=1.000 n=6}
_Types	_199,525	_199,525	_~	_~	_~	_{p=1.000 n=6}
_{Memory Used}	_{330,497k (± 0.04%)}	_{330,835k (± 0.04%)}	_{+338k (+ 0.10%)}	_330,635k	_330,987k	_{p=0.005 n=6}
_{Memory Allocs}	_{2,552,153 (± 0.03%)}	_{2,551,737 (± 0.04%)}	_~	_2,550,932	_2,553,602	_{p=0.378 n=6}
_{Config Time}	_0.001s	_{0.001s (±34.96%)}	_~	_0.001s	_0.002s	_{p=0.405 n=6}
_{Parse Time}	_{0.133s (± 3.89%)}	_{0.138s (± 4.58%)}	_~	_0.129s	_0.147s	_{p=0.199 n=6}
_{Bind Time}	_0.000s	_0.000s	_~	_~	_~	_{p=1.000 n=6}
_{Check Time}	_{1.378s (± 0.45%)}	_{1.379s (± 0.64%)}	_~	_1.365s	_1.391s	_{p=0.873 n=6}
_{Emit Time}	_{0.081s (± 4.41%)}	_{0.082s (±10.96%)}	_~	_0.072s	_0.097s	_{p=0.747 n=6}
_{Total Time}	_{1.649s (± 0.40%)}	_{1.652s (± 0.86%)}	_~	_1.637s	_1.672s	_{p=0.872 n=6}
_{ts-pre-modules - native}
_Errors	₃	₃	_~	_~	_~	_{p=1.000 n=6}
_Symbols	₇₅₂	₇₅₂	_~	_~	_~	_{p=1.000 n=6}
_Types	₃₅₆	₃₅₆	_~	_~	_~	_{p=1.000 n=6}
_{Memory Used}	_{103,313k (± 0.03%)}	_{103,308k (± 0.04%)}	_~	_103,276k	_103,379k	_{p=0.689 n=6}
_{Memory Allocs}	_{111,128 (± 0.43%)}	_{110,651 (± 0.30%)}	_~	_110,295	_111,235	_{p=0.093 n=6}
_{Config Time}	_{0.001s (±48.94%)}	_{0.001s (±77.38%)}	_~	_0.000s	_0.001s	_{p=0.595 n=6}
_{Parse Time}	_{0.122s (± 5.85%)}	_{0.119s (± 5.61%)}	_~	_0.111s	_0.128s	_{p=0.688 n=6}
_{Bind Time}	_0s	_0s	_~	_~	_~	_{p=1.000 n=6}
_{Check Time}	_0s	_0s	_~	_~	_~	_{p=1.000 n=6}
_{Emit Time}	_0.000s	_0.000s	_~	_~	_~	_{p=1.000 n=6}
_{Total Time}	_{0.123s (± 5.81%)}	_{0.120s (± 5.45%)}	_~	_0.112s	_0.129s	_{p=0.688 n=6}
_{vscode - native}
_Errors	₁₉₃	₁₉₃	_~	_~	_~	_{p=1.000 n=6}
_Symbols	_6,058,532	_6,058,532	_~	_~	_~	_{p=1.000 n=6}
_Types	_2,289,675	_2,289,675	_~	_~	_~	_{p=1.000 n=6}
_{Memory Used}	_{4,113,456k (± 0.03%)}	_{4,121,967k (± 0.03%)}	_{+8,511k (+ 0.21%)}	_4,120,055k	_4,123,338k	_{p=0.005 n=6}
_{Memory Allocs}	_{29,865,138 (± 0.05%)}	_{29,853,017 (± 0.03%)}	_~	_29,840,400	_29,868,418	_{p=0.128 n=6}
_{Config Time}	_{0.125s (± 9.62%)}	_{0.122s (± 8.57%)}	_~	_0.107s	_0.135s	_{p=0.630 n=6}
_{Parse Time}	_{0.718s (± 1.59%)}	_{0.695s (± 3.02%)}	_{🟩-0.023s (- 3.23%)}	_0.657s	_0.712s	_{p=0.045 n=6}
_{Bind Time}	_{0.108s (± 2.31%)}	_{0.116s (±12.74%)}	_~	_0.107s	_0.146s	_{p=0.125 n=6}
_{Check Time}	_{8.140s (± 0.47%)}	_{8.160s (± 0.56%)}	_~	_8.117s	_8.242s	_{p=0.575 n=6}
_{Emit Time}	_{2.002s (± 2.30%)}	_{1.993s (± 8.00%)}	_~	_1.678s	_2.109s	_{p=0.471 n=6}
_{Total Time}	_{11.114s (± 0.58%)}	_{11.109s (± 0.91%)}	_~	_10.925s	_11.206s	_{p=0.936 n=6}
_{webpack - native}
_Errors	_1,146	_1,146	_~	_~	_~	_{p=1.000 n=6}
_Symbols	_699,634	_699,634	_~	_~	_~	_{p=1.000 n=6}
_Types	_334,753	_334,753	_~	_~	_~	_{p=1.000 n=6}
_{Memory Used}	_{550,493k (± 0.03%)}	_{551,307k (± 0.03%)}	_{+814k (+ 0.15%)}	_551,118k	_551,511k	_{p=0.005 n=6}
_{Memory Allocs}	_{4,217,238 (± 0.07%)}	_{4,233,308 (± 0.45%)}	_{+16,070 (+ 0.38%)}	_4,218,739	_4,270,951	_{p=0.013 n=6}
_{Config Time}	_{0.014s (±15.72%)}	_{0.012s (±14.14%)}	_~	_0.010s	_0.014s	_{p=0.157 n=6}
_{Parse Time}	_{0.144s (± 4.10%)}	_{0.145s (± 4.31%)}	_~	_0.139s	_0.156s	_{p=0.810 n=6}
_{Bind Time}	_{0.030s (±26.69%)}	_{0.032s (±25.68%)}	_~	_0.022s	_0.044s	_{p=0.574 n=6}
_{Check Time}	_{1.141s (± 1.02%)}	_{1.145s (± 0.59%)}	_~	_1.134s	_1.155s	_{p=0.630 n=6}
_{Emit Time}	_{0.001s (±34.96%)}	_{0.001s (±38.69%)}	_~	_0.001s	_0.002s	_{p=0.595 n=6}
_{Total Time}	_{1.351s (± 0.97%)}	_{1.357s (± 0.56%)}	_~	_1.348s	_1.366s	_{p=0.377 n=6}
_{xstate-main - native}
_Errors	₀	₀	_~	_~	_~	_{p=1.000 n=6}
_Symbols	_991,165	_991,165	_~	_~	_~	_{p=1.000 n=6}
_Types	_350,724	_350,724	_~	_~	_~	_{p=1.000 n=6}
_{Memory Used}	_{599,925k (± 0.01%)}	_{601,741k (± 0.02%)}	_{+1,816k (+ 0.30%)}	_601,676k	_601,951k	_{p=0.005 n=6}
_{Memory Allocs}	_{4,957,136 (± 0.23%)}	_{4,943,936 (± 0.09%)}	_{-13,201 (- 0.27%)}	_4,939,110	_4,950,852	_{p=0.013 n=6}
_{Config Time}	_{0.007s (±27.08%)}	_{0.008s (±18.77%)}	_~	_0.005s	_0.009s	_{p=0.616 n=6}
_{Parse Time}	_{0.137s (± 6.24%)}	_{0.136s (± 2.90%)}	_~	_0.132s	_0.141s	_{p=0.871 n=6}
_{Bind Time}	_{0.038s (±19.89%)}	_{0.032s (±21.86%)}	_~	_0.025s	_0.042s	_{p=0.065 n=6}
_{Check Time}	_{1.122s (± 0.65%)}	_{1.136s (± 1.40%)}	_~	_1.116s	_1.150s	_{p=0.148 n=6}
_{Emit Time}	_0.001s	_0.001s	_~	_~	_~	_{p=1.000 n=6}
_{Total Time}	_{1.308s (± 0.86%)}	_{1.316s (± 0.71%)}	_~	_1.299s	_1.324s	_{p=0.173 n=6}

System info unknown

Hosts

native

Scenarios

Compiler-Unions - native
angular-1 - native
mui-docs - native
self-build-src - native
self-compiler - native
ts-pre-modules - native
vscode - native
webpack - native
xstate-main - native

_Benchmark	_Name	_Iterations
_Current	_pr	₆
_Baseline	_baseline	₆

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Replace most ID usage with pointers#3362

Replace most ID usage with pointers#3362
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