Pull off full code points in template literal inference by jakebailey · Pull Request #63537 · microsoft/TypeScript

Jake Bailey (jakebailey) · 2026-06-05T17:55:32Z

See #63533, microsoft/typescript-go#4137, microsoft/typescript-go#4181

Jake Bailey (jakebailey) · 2026-06-05T17:56:41Z

TypeScript Bot (@typescript-bot) user test this
TypeScript Bot (@typescript-bot) test top800
TypeScript Bot (@typescript-bot) run dt
TypeScript Bot (@typescript-bot) perf test this faster

TypeScript Bot (typescript-bot) · 2026-06-05T17:56:46Z

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

Command	Status	Results
`user test this`	✅ Started	✅ Results
`test top800`	✅ Started	✅ Results
`run dt`	✅ Started	✅ Results
`perf test this faster`	✅ Started	👀 Results

TypeScript Bot (typescript-bot) · 2026-06-05T18:20:42Z

Hey Jake Bailey (@jakebailey), the results of running the DT tests are ready.

Everything looks the same!

You can check the log here.

TypeScript Bot (typescript-bot) · 2026-06-05T18:28:33Z

Jake Bailey (@jakebailey) Here are the results of running the user tests with tsc comparing main and refs/pull/63537/merge:

There were infrastructure failures potentially unrelated to your change:

1 instance of "Git clone failed"
1 instance of "Package install failed"

Otherwise...

Everything looks good!

TypeScript Bot (typescript-bot) · 2026-06-05T18:54:48Z

Jake Bailey (@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 - node (v18.15.0, x64)}
_Errors	₃	₃	_~	_~	_~	_{p=1.000 n=6}
_Symbols	_82,521	_82,521	_~	_~	_~	_{p=1.000 n=6}
_Types	_125,280	_125,280	_~	_~	_~	_{p=1.000 n=6}
_{Memory Used}	_{275,022k (± 0.53%)}	_{276,151k (± 0.70%)}	_~	_274,348k	_277,997k	_{p=0.810 n=6}
_{Memory Allocs}	₀	₀	_~	_~	_~	_{p=1.000 n=6}
_{Config Time}	_0s	_0s	_~	_~	_~	_{p=1.000 n=6}
_{Parse Time}	_{1.30s (± 0.94%)}	_{1.30s (± 0.63%)}	_~	_1.29s	_1.31s	_{p=0.120 n=6}
_{Bind Time}	_0.75s	_0.75s	_~	_~	_~	_{p=1.000 n=6}
_{Check Time}	_{14.36s (± 3.15%)}	_{14.13s (± 0.38%)}	_~	_14.05s	_14.21s	_{p=0.378 n=6}
_{Emit Time}	_{2.66s (± 0.56%)}	_{2.65s (± 0.69%)}	_~	_2.63s	_2.68s	_{p=0.289 n=6}
_{Total Time}	_{19.09s (± 2.44%)}	_{18.84s (± 0.30%)}	_~	_18.74s	_18.91s	_{p=0.378 n=6}
_{angular-1 - node (v18.15.0, x64)}
_Errors	₃	₃	_~	_~	_~	_{p=1.000 n=6}
_Symbols	_959,140	_959,140	_~	_~	_~	_{p=1.000 n=6}
_Types	_416,033	_416,033	_~	_~	_~	_{p=1.000 n=6}
_{Memory Used}	_{1,261,138k (± 0.00%)}	_{1,261,149k (± 0.00%)}	_~	_1,261,091k	_1,261,200k	_{p=0.689 n=6}
_{Memory Allocs}	₀	₀	_~	_~	_~	_{p=1.000 n=6}
_{Config Time}	_0s	_0s	_~	_~	_~	_{p=1.000 n=6}
_{Parse Time}	_{6.53s (± 0.65%)}	_{6.54s (± 0.65%)}	_~	_6.50s	_6.62s	_{p=0.808 n=6}
_{Bind Time}	_{1.97s (± 0.38%)}	_{1.97s (± 0.38%)}	_~	_1.96s	_1.98s	_{p=1.000 n=6}
_{Check Time}	_{32.46s (± 0.30%)}	_{32.45s (± 0.26%)}	_~	_32.32s	_32.55s	_{p=0.810 n=6}
_{Emit Time}	_{15.09s (± 0.36%)}	_{15.10s (± 0.41%)}	_~	_15.02s	_15.17s	_{p=0.748 n=6}
_{Total Time}	_{56.06s (± 0.14%)}	_{56.06s (± 0.24%)}	_~	_55.94s	_56.31s	_{p=0.810 n=6}
_{mui-docs - node (v18.15.0, x64)}
_Errors	_11,246	_11,246	_~	_~	_~	_{p=1.000 n=6}
_Symbols	_2,568,551	_2,568,551	_~	_~	_~	_{p=1.000 n=6}
_Types	_794,921	_794,921	_~	_~	_~	_{p=1.000 n=6}
_{Memory Used}	_{2,878,309k (± 0.00%)}	_{2,878,263k (± 0.00%)}	_~	_2,878,158k	_2,878,354k	_{p=0.298 n=6}
_{Memory Allocs}	₀	₀	_~	_~	_~	_{p=1.000 n=6}
_{Config Time}	_0s	_0s	_~	_~	_~	_{p=1.000 n=6}
_{Parse Time}	_{7.92s (± 0.39%)}	_{7.91s (± 0.19%)}	_~	_7.88s	_7.92s	_{p=0.565 n=6}
_{Bind Time}	_{2.07s (± 0.85%)}	_{2.07s (± 0.58%)}	_~	_2.05s	_2.08s	_{p=0.858 n=6}
_{Check Time}	_{81.68s (± 0.32%)}	_{81.52s (± 0.66%)}	_~	_80.74s	_82.26s	_{p=0.575 n=6}
_{Emit Time}	_{0.30s (± 1.37%)}	_{0.30s (± 1.74%)}	_~	_0.29s	_0.30s	_{p=0.595 n=6}
_{Total Time}	_{91.97s (± 0.29%)}	_{91.80s (± 0.59%)}	_~	_91.01s	_92.55s	_{p=0.630 n=6}
_{self-build-src - node (v18.15.0, x64)}
_Errors	₀	₀	_~	_~	_~	_{p=1.000 n=6}
_Symbols	_1,227,405	_1,227,406	_{+1 (+ 0.00%)}	_~	_~	_{p=0.001 n=6}
_Types	_267,208	_267,208	_~	_~	_~	_{p=1.000 n=6}
_{Memory Used}	_{2,474,192k (± 7.59%)}	_{2,534,700k (± 7.85%)}	_~	_2,351,908k	_2,716,911k	_{p=1.000 n=6}
_{Memory Allocs}	₀	₀	_~	_~	_~	_{p=1.000 n=6}
_{Config Time}	_0s	_0s	_~	_~	_~	_{p=1.000 n=6}
_{Parse Time}	_{5.20s (± 0.83%)}	_{5.23s (± 0.88%)}	_~	_5.17s	_5.28s	_{p=0.423 n=6}
_{Bind Time}	_{1.87s (± 1.39%)}	_{1.86s (± 1.25%)}	_~	_1.83s	_1.89s	_{p=0.421 n=6}
_{Check Time}	_{35.77s (± 1.19%)}	_{35.58s (± 0.78%)}	_~	_35.30s	_35.95s	_{p=0.471 n=6}
_{Emit Time}	_{3.10s (± 4.34%)}	_{3.02s (± 3.54%)}	_~	_2.91s	_3.22s	_{p=0.066 n=6}
_{Total Time}	_{45.94s (± 0.79%)}	_{45.69s (± 0.51%)}	_~	_45.45s	_45.91s	_{p=0.173 n=6}
_{self-build-src-public-api - node (v18.15.0, x64)}
_Errors	₀	₀	_~	_~	_~	_{p=1.000 n=6}
_Symbols	_1,227,405	_1,227,406	_{+1 (+ 0.00%)}	_~	_~	_{p=0.001 n=6}
_Types	_267,208	_267,208	_~	_~	_~	_{p=1.000 n=6}
_{Memory Used}	_{2,785,452k (± 0.03%)}	_{2,724,534k (± 5.40%)}	_~	_2,423,730k	_2,786,859k	_{p=0.128 n=6}
_{Memory Allocs}	₀	₀	_~	_~	_~	_{p=1.000 n=6}
_{Config Time}	_0s	_0s	_~	_~	_~	_{p=1.000 n=6}
_{Parse Time}	_{6.76s (± 0.75%)}	_{6.72s (± 1.07%)}	_~	_6.65s	_6.83s	_{p=0.173 n=6}
_{Bind Time}	_{2.27s (± 1.07%)}	_{2.26s (± 0.98%)}	_~	_2.23s	_2.29s	_{p=0.747 n=6}
_{Check Time}	_{42.72s (± 0.75%)}	_{43.00s (± 1.04%)}	_~	_42.40s	_43.42s	_{p=0.298 n=6}
_{Emit Time}	_{3.48s (± 2.96%)}	_{3.64s (± 2.79%)}	_{🔻+0.16s (+ 4.64%)}	_3.48s	_3.71s	_{p=0.030 n=6}
_{Total Time}	_{55.23s (± 0.82%)}	_{55.63s (± 1.05%)}	_~	_54.81s	_56.19s	_{p=0.298 n=6}
_{self-compiler - node (v18.15.0, x64)}
_Errors	₀	₀	_~	_~	_~	_{p=1.000 n=6}
_Symbols	_261,660	_261,661	_{+1 (+ 0.00%)}	_~	_~	_{p=0.001 n=6}
_Types	_104,323	_104,323	_~	_~	_~	_{p=1.000 n=6}
_{Memory Used}	_{439,344k (± 0.01%)}	_{439,364k (± 0.01%)}	_~	_439,310k	_439,421k	_{p=0.298 n=6}
_{Memory Allocs}	₀	₀	_~	_~	_~	_{p=1.000 n=6}
_{Config Time}	_0s	_0s	_~	_~	_~	_{p=1.000 n=6}
_{Parse Time}	_{4.37s (± 0.55%)}	_{4.40s (± 0.85%)}	_~	_4.33s	_4.44s	_{p=0.053 n=6}
_{Bind Time}	_{1.70s (± 0.74%)}	_{1.70s (± 1.36%)}	_~	_1.66s	_1.72s	_{p=0.620 n=6}
_{Check Time}	_{23.96s (± 0.29%)}	_{23.95s (± 0.21%)}	_~	_23.89s	_24.02s	_{p=1.000 n=6}
_{Emit Time}	_{1.93s (± 0.78%)}	_{1.92s (± 0.97%)}	_~	_1.89s	_1.94s	_{p=0.289 n=6}
_{Total Time}	_{31.96s (± 0.20%)}	_{31.98s (± 0.23%)}	_~	_31.87s	_32.06s	_{p=0.630 n=6}
_{ts-pre-modules - node (v18.15.0, x64)}
_Errors	₂₇₁	₂₇₁	_~	_~	_~	_{p=1.000 n=6}
_Symbols	_225,897	_225,897	_~	_~	_~	_{p=1.000 n=6}
_Types	_93,564	_93,564	_~	_~	_~	_{p=1.000 n=6}
_{Memory Used}	_{371,588k (± 0.01%)}	_{371,597k (± 0.01%)}	_~	_371,530k	_371,665k	_{p=0.873 n=6}
_{Memory Allocs}	₀	₀	_~	_~	_~	_{p=1.000 n=6}
_{Config Time}	_0s	_0s	_~	_~	_~	_{p=1.000 n=6}
_{Parse Time}	_{2.86s (± 0.49%)}	_{2.86s (± 0.93%)}	_~	_2.82s	_2.88s	_{p=1.000 n=6}
_{Bind Time}	_{1.63s (± 0.60%)}	_{1.61s (± 1.16%)}	_~	_1.58s	_1.63s	_{p=0.070 n=6}
_{Check Time}	_{17.43s (± 0.52%)}	_{17.43s (± 0.36%)}	_~	_17.38s	_17.55s	_{p=1.000 n=6}
_{Emit Time}	_0.00s	_0.00s	_~	_~	_~	_{p=1.000 n=6}
_{Total Time}	_{21.92s (± 0.44%)}	_{21.90s (± 0.21%)}	_~	_21.83s	_21.97s	_{p=0.688 n=6}
_{vscode - node (v18.15.0, x64)}
_Errors	₀	₀	_~	_~	_~	_{p=NaN n=0}
_Symbols	₀	₀	_~	_~	_~	_{p=NaN n=0}
_Types	₀	₀	_~	_~	_~	_{p=NaN n=0}
_{Memory Used}	_0k	_0k	_~	_~	_~	_{p=NaN n=0}
_{Memory Allocs}	₀	₀	_~	_~	_~	_{p=NaN n=0}
_{Config Time}	_0s	_0s	_~	_~	_~	_{p=NaN n=0}
_{Parse Time}	_0s	_0s	_~	_~	_~	_{p=NaN n=0}
_{Bind Time}	_0s	_0s	_~	_~	_~	_{p=NaN n=0}
_{Check Time}	_0s	_0s	_~	_~	_~	_{p=NaN n=0}
_{Emit Time}	_0s	_0s	_~	_~	_~	_{p=NaN n=0}
_{Total Time}	_0s	_0s	_~	_~	_~	_{p=NaN n=0}
_{webpack - node (v18.15.0, x64)}
_Errors	₀	₀	_~	_~	_~	_{p=1.000 n=6}
_Symbols	_411,923	_411,923	_~	_~	_~	_{p=1.000 n=6}
_Types	_187,000	_187,000	_~	_~	_~	_{p=1.000 n=6}
_{Memory Used}	_{582,081k (± 0.05%)}	_{582,187k (± 0.04%)}	_~	_581,852k	_582,400k	_{p=0.378 n=6}
_{Memory Allocs}	₀	₀	_~	_~	_~	_{p=1.000 n=6}
_{Config Time}	_0s	_0s	_~	_~	_~	_{p=1.000 n=6}
_{Parse Time}	_{6.05s (± 0.85%)}	_{6.05s (± 0.19%)}	_~	_6.03s	_6.06s	_{p=0.376 n=6}
_{Bind Time}	_{2.62s (± 2.08%)}	_{2.63s (± 1.65%)}	_~	_2.58s	_2.67s	_{p=0.747 n=6}
_{Check Time}	_{30.75s (± 0.33%)}	_{30.61s (± 0.28%)}	_~	_30.52s	_30.72s	_{p=0.077 n=6}
_{Emit Time}	_{0.01s (±63.18%)}	_{0.01s (±109.43%)}	_~	_0.00s	_0.01s	_{p=0.201 n=6}
_{Total Time}	_{39.44s (± 0.32%)}	_{39.30s (± 0.27%)}	_~	_39.18s	_39.44s	_{p=0.054 n=6}
_{xstate-main - node (v18.15.0, x64)}
_Errors	₀	₀	_~	_~	_~	_{p=1.000 n=6}
_Symbols	_821,648	_821,648	_~	_~	_~	_{p=1.000 n=6}
_Types	_247,134	_247,134	_~	_~	_~	_{p=1.000 n=6}
_{Memory Used}	_{725,950k (± 0.04%)}	_{726,012k (± 0.02%)}	_~	_725,773k	_726,217k	_{p=0.810 n=6}
_{Memory Allocs}	₀	₀	_~	_~	_~	_{p=1.000 n=6}
_{Config Time}	_0s	_0s	_~	_~	_~	_{p=1.000 n=6}
_{Parse Time}	_{4.92s (± 1.01%)}	_{4.93s (± 0.72%)}	_~	_4.88s	_4.97s	_{p=0.574 n=6}
_{Bind Time}	_{1.61s (± 1.00%)}	_{1.61s (± 0.78%)}	_~	_1.59s	_1.63s	_{p=0.446 n=6}
_{Check Time}	_{24.01s (± 2.02%)}	_{23.79s (± 0.37%)}	_~	_23.65s	_23.92s	_{p=1.000 n=6}
_{Emit Time}	_{0.00s (±244.70%)}	_{0.01s (±167.16%)}	_~	_0.00s	_0.02s	_{p=0.527 n=6}
_{Total Time}	_{30.54s (± 1.53%)}	_{30.34s (± 0.34%)}	_~	_30.18s	_30.47s	_{p=0.873 n=6}

System info unknown

Hosts

node (v18.15.0, x64)

Scenarios

Compiler-Unions - node (v18.15.0, x64)
angular-1 - node (v18.15.0, x64)
mui-docs - node (v18.15.0, x64)
self-build-src - node (v18.15.0, x64)
self-build-src-public-api - node (v18.15.0, x64)
self-compiler - node (v18.15.0, x64)
ts-pre-modules - node (v18.15.0, x64)
vscode - node (v18.15.0, x64)
webpack - node (v18.15.0, x64)
xstate-main - node (v18.15.0, x64)

_Benchmark	_Name	_Iterations
_Current	_pr	₆
_Baseline	_baseline	₆

Developer Information:

Download Benchmarks

TypeScript Bot (typescript-bot) · 2026-06-05T19:55:47Z

Jake Bailey (@jakebailey) Here are the results of running the top 800 repos with tsc comparing main and refs/pull/63537/merge:

Everything looks good!

Jake Bailey (jakebailey) · 2026-06-05T21:45:46Z

While here, testing the new bot infra quick

TypeScript Bot (@typescript-bot) user test this

Pull off full code points in template literal inference

36ba8ca

TypeScript Bot (typescript-bot) assigned Jake Bailey (jakebailey) Jun 5, 2026

TypeScript Bot (typescript-bot) added Author: Team For Uncommitted Bug PR for untriaged, rejected, closed or missing bug labels Jun 5, 2026

Jake Bailey (jakebailey) closed this Jun 5, 2026

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Pull off full code points in template literal inference - #63537

Pull off full code points in template literal inference#63537
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