Allow references to const enums when provably emitted via preserveConstEnums by jakebailey · Pull Request #57996 · microsoft/TypeScript

Jake Bailey (jakebailey) · 2024-03-29T03:55:15Z

This builds on #57914, allowing references to const enums in value space when we can "prove" that they will actually be emitted due to preserveConstEnums.

Fixes#51530

Jake Bailey (jakebailey) · 2024-03-29T03:56:29Z

Also, maybe this fixes #37774?

Jake Bailey (jakebailey) · 2024-03-29T03:56:45Z

TypeScript Bot (@typescript-bot) test it
TypeScript Bot (@typescript-bot) pack this

TypeScript Bot (typescript-bot) · 2024-03-29T03:56:48Z

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

Command	Status	Results
`test top400`	✅ Started	✅ Results
`user test this`	✅ Started	✅ Results
`run dt`	✅ Started	✅ Results
`perf test this faster`	✅ Started	👀 Results
`pack this`	✅ Started	✅ Results

TypeScript Bot (typescript-bot) · 2024-03-29T04:01:26Z

Hey Jake Bailey (@jakebailey), I've packed this into an installable tgz. You can install it for testing by referencing it in your package.json like so:

{
"devDependencies": {
"typescript": "https://typescript.visualstudio.com/cf7ac146-d525-443c-b23c-0d58337efebc/_apis/build/builds/160843/artifacts?artifactName=tgz&fileId=DE8A6B6A55FC275C2C80E9AD8BC0CF251E1483AAE628B14D800392428040634102&fileName=/typescript-5.5.0-insiders.20240329.tgz"
}
}

and then running npm install.

There is also a playground for this build and an npm module you can use via "typescript": "npm:@typescript-deploys/pr-build@5.5.0-pr-57996-3".;

TypeScript Bot (typescript-bot) · 2024-03-29T04:17:12Z

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) · 2024-03-29T04:22:24Z

Jake Bailey (@jakebailey) Here are the results of running the user tests comparing main and refs/pull/57996/merge:

Everything looks good!

TypeScript Bot (typescript-bot) · 2024-03-29T04:27:09Z

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
_{Angular - node (v18.15.0, x64)}
_{Memory used}	_{295,676k (± 0.01%)}	_{295,674k (± 0.01%)}	_~	_295,632k	_295,713k	_{p=1.000 n=6}
_{Parse Time}	_{2.66s (± 0.24%)}	_{2.67s (± 0.15%)}	_{+0.01s (+ 0.31%)}	_2.66s	_2.67s	_{p=0.033 n=6}
_{Bind Time}	_{0.83s (± 0.98%)}	_{0.83s (± 0.00%)}	_~	_0.83s	_0.83s	_{p=0.405 n=6}
_{Check Time}	_{8.24s (± 0.32%)}	_{8.24s (± 0.38%)}	_~	_8.20s	_8.28s	_{p=0.936 n=6}
_{Emit Time}	_{7.05s (± 0.39%)}	_{7.04s (± 0.24%)}	_~	_7.01s	_7.06s	_{p=0.466 n=6}
_{Total Time}	_{18.79s (± 0.21%)}	_{18.78s (± 0.21%)}	_~	_18.71s	_18.83s	_{p=0.688 n=6}
_{Compiler-Unions - node (v18.15.0, x64)}
_{Memory used}	_{193,888k (± 1.03%)}	_{193,853k (± 1.03%)}	_~	_191,982k	_195,811k	_{p=0.748 n=6}
_{Parse Time}	_{1.64s (± 1.52%)}	_{1.65s (± 1.42%)}	_~	_1.62s	_1.68s	_{p=0.871 n=6}
_{Bind Time}	_{0.88s (± 1.33%)}	_{0.88s (± 0.93%)}	_~	_0.87s	_0.89s	_{p=0.738 n=6}
_{Check Time}	_{11.28s (± 0.53%)}	_{11.25s (± 0.34%)}	_~	_11.21s	_11.30s	_{p=0.260 n=6}
_{Emit Time}	_{3.15s (± 0.49%)}	_{3.15s (± 0.44%)}	_~	_3.14s	_3.17s	_{p=0.557 n=6}
_{Total Time}	_{16.95s (± 0.40%)}	_{16.92s (± 0.27%)}	_~	_16.87s	_16.98s	_{p=0.294 n=6}
_{Monaco - node (v18.15.0, x64)}
_{Memory used}	_{347,397k (± 0.01%)}	_{347,420k (± 0.00%)}	_~	_347,410k	_347,427k	_{p=0.054 n=6}
_{Parse Time}	_{3.70s (± 0.89%)}	_{3.69s (± 0.77%)}	_~	_3.65s	_3.73s	_{p=0.686 n=6}
_{Bind Time}	_{1.38s (± 0.40%)}	_{1.37s (± 0.75%)}	_~	_1.36s	_1.39s	_{p=0.663 n=6}
_{Check Time}	_{10.24s (± 0.65%)}	_{10.24s (± 0.28%)}	_~	_10.20s	_10.28s	_{p=0.630 n=6}
_{Emit Time}	_{6.03s (± 0.47%)}	_{6.00s (± 0.54%)}	_~	_5.97s	_6.06s	_{p=0.172 n=6}
_{Total Time}	_{21.34s (± 0.36%)}	_{21.30s (± 0.29%)}	_~	_21.23s	_21.40s	_{p=0.336 n=6}
_{TFS - node (v18.15.0, x64)}
_{Memory used}	_{302,781k (± 0.01%)}	_{302,800k (± 0.02%)}	_~	_302,753k	_302,879k	_{p=0.688 n=6}
_{Parse Time}	_{2.43s (± 0.96%)}	_{2.41s (± 1.25%)}	_~	_2.37s	_2.45s	_{p=0.293 n=6}
_{Bind Time}	_{1.19s (± 0.88%)}	_{1.22s (± 1.98%)}	_~	_1.18s	_1.25s	_{p=0.053 n=6}
_{Check Time}	_{7.52s (± 0.34%)}	_{7.52s (± 0.37%)}	_~	_7.47s	_7.55s	_{p=0.737 n=6}
_{Emit Time}	_{4.25s (± 0.52%)}	_{4.27s (± 0.57%)}	_~	_4.25s	_4.32s	_{p=0.180 n=6}
_{Total Time}	_{15.39s (± 0.17%)}	_{15.43s (± 0.23%)}	_~	_15.40s	_15.49s	_{p=0.220 n=6}
_{material-ui - node (v18.15.0, x64)}
_{Memory used}	_{510,183k (± 0.01%)}	_{510,157k (± 0.01%)}	_~	_510,043k	_510,273k	_{p=0.521 n=6}
_{Parse Time}	_{3.92s (± 0.50%)}	_{3.93s (± 0.71%)}	_~	_3.90s	_3.98s	_{p=0.934 n=6}
_{Bind Time}	_{1.46s (± 1.33%)}	_{1.45s (± 0.68%)}	_~	_1.44s	_1.46s	_{p=0.508 n=6}
_{Check Time}	_{25.42s (± 0.21%)}	_{25.45s (± 0.22%)}	_~	_25.39s	_25.55s	_{p=0.421 n=6}
_{Emit Time}	_{0.00s (± 0.00%)}	_{0.00s (± 0.00%)}	_~	_0.00s	_0.00s	_{p=1.000 n=6}
_{Total Time}	_{30.80s (± 0.22%)}	_{30.83s (± 0.22%)}	_~	_30.74s	_30.93s	_{p=0.469 n=6}
_{mui-docs - node (v18.15.0, x64)}
_{Memory used}	_{1,744,651k (± 0.00%)}	_{1,744,680k (± 0.00%)}	_~	_1,744,644k	_1,744,753k	_{p=0.173 n=6}
_{Parse Time}	_{9.63s (± 0.71%)}	_{9.63s (± 0.65%)}	_~	_9.55s	_9.72s	_{p=1.000 n=6}
_{Bind Time}	_{3.43s (± 1.04%)}	_{3.43s (± 1.42%)}	_~	_3.37s	_3.48s	_{p=0.935 n=6}
_{Check Time}	_{81.77s (± 0.54%)}	_{81.57s (± 0.55%)}	_~	_81.03s	_82.05s	_{p=0.471 n=6}
_{Emit Time}	_{0.19s (± 4.29%)}	_{0.19s (± 2.81%)}	_~	_0.19s	_0.20s	_{p=0.855 n=6}
_{Total Time}	_{95.02s (± 0.52%)}	_{94.83s (± 0.46%)}	_~	_94.26s	_95.31s	_{p=0.470 n=6}
_{self-build-src - node (v18.15.0, x64)}
_{Memory used}	_{2,397,089k (± 0.03%)}	_{2,397,332k (± 0.01%)}	_~	_2,396,858k	_2,397,682k	_{p=0.575 n=6}
_{Parse Time}	_{7.45s (± 0.82%)}	_{7.48s (± 0.62%)}	_~	_7.40s	_7.52s	_{p=0.689 n=6}
_{Bind Time}	_{2.78s (± 0.37%)}	_{2.77s (± 1.06%)}	_~	_2.73s	_2.81s	_{p=0.808 n=6}
_{Check Time}	_{49.31s (± 0.39%)}	_{49.39s (± 0.45%)}	_~	_49.13s	_49.68s	_{p=0.521 n=6}
_{Emit Time}	_{3.98s (± 1.23%)}	_{3.90s (± 1.66%)}	_~	_3.79s	_3.97s	_{p=0.065 n=6}
_{Total Time}	_{63.53s (± 0.41%)}	_{63.55s (± 0.43%)}	_~	_63.23s	_63.91s	_{p=0.936 n=6}
_{self-compiler - node (v18.15.0, x64)}
_{Memory used}	_{416,181k (± 0.01%)}	_{416,174k (± 0.01%)}	_~	_416,137k	_416,227k	_{p=0.810 n=6}
_{Parse Time}	_{3.34s (± 1.02%)}	_{3.35s (± 0.99%)}	_~	_3.31s	_3.39s	_{p=0.573 n=6}
_{Bind Time}	_{1.30s (± 0.63%)}	_{1.30s (± 0.58%)}	_~	_1.29s	_1.31s	_{p=0.729 n=6}
_{Check Time}	_{18.28s (± 0.35%)}	_{18.22s (± 0.26%)}	_~	_18.17s	_18.28s	_{p=0.199 n=6}
_{Emit Time}	_{1.36s (± 1.80%)}	_{1.36s (± 1.36%)}	_~	_1.34s	_1.39s	_{p=1.000 n=6}
_{Total Time}	_{24.27s (± 0.33%)}	_{24.23s (± 0.25%)}	_~	_24.17s	_24.32s	_{p=0.470 n=6}
_{vscode - node (v18.15.0, x64)}
_{Memory used}	_{2,898,560k (± 0.00%)}	_{2,898,566k (± 0.00%)}	_~	_2,898,516k	_2,898,618k	_{p=1.000 n=6}
_{Parse Time}	_{12.96s (± 0.31%)}	_{12.96s (± 0.41%)}	_~	_12.90s	_13.04s	_{p=0.872 n=6}
_{Bind Time}	_{4.13s (± 0.60%)}	_{4.14s (± 0.52%)}	_~	_4.11s	_4.17s	_{p=0.517 n=6}
_{Check Time}	_{72.11s (± 0.55%)}	_{71.89s (± 0.42%)}	_~	_71.38s	_72.24s	_{p=0.521 n=6}
_{Emit Time}	_{19.48s (± 0.79%)}	_{19.42s (± 0.31%)}	_~	_19.34s	_19.51s	_{p=0.230 n=6}
_{Total Time}	_{108.67s (± 0.40%)}	_{108.41s (± 0.23%)}	_~	_107.98s	_108.65s	_{p=0.471 n=6}
_{webpack - node (v18.15.0, x64)}
_{Memory used}	_{408,804k (± 0.02%)}	_{408,793k (± 0.01%)}	_~	_408,748k	_408,849k	_{p=0.689 n=6}
_{Parse Time}	_{3.22s (± 0.64%)}	_{3.23s (± 0.30%)}	_~	_3.22s	_3.24s	_{p=0.565 n=6}
_{Bind Time}	_{1.41s (± 0.45%)}	_{1.41s (± 0.98%)}	_~	_1.38s	_1.42s	_{p=0.654 n=6}
_{Check Time}	_{14.30s (± 0.45%)}	_{14.31s (± 0.45%)}	_~	_14.24s	_14.42s	_{p=0.810 n=6}
_{Emit Time}	_{0.00s (± 0.00%)}	_{0.00s (± 0.00%)}	_~	_0.00s	_0.00s	_{p=1.000 n=6}
_{Total Time}	_{18.93s (± 0.24%)}	_{18.95s (± 0.37%)}	_~	_18.87s	_19.07s	_{p=0.936 n=6}
_{xstate - node (v18.15.0, x64)}
_{Memory used}	_{513,438k (± 0.01%)}	_{513,457k (± 0.01%)}	_~	_513,406k	_513,548k	_{p=0.810 n=6}
_{Parse Time}	_{3.95s (± 0.34%)}	_{3.96s (± 0.71%)}	_~	_3.93s	_4.01s	_{p=0.572 n=6}
_{Bind Time}	_{1.89s (± 1.49%)}	_{1.88s (± 0.87%)}	_~	_1.86s	_1.90s	_{p=1.000 n=6}
_{Check Time}	_{3.42s (± 0.30%)}	_{3.43s (± 0.32%)}	_~	_3.42s	_3.44s	_{p=0.337 n=6}
_{Emit Time}	_{0.08s (± 4.99%)}	_{0.09s (± 4.62%)}	_{🔻+0.01s (+ 8.16%)}	_0.08s	_0.09s	_{p=0.034 n=6}
_{Total Time}	_{9.35s (± 0.47%)}	_{9.37s (± 0.48%)}	_~	_9.29s	_9.42s	_{p=0.470 n=6}

System info unknown

Hosts

node (v18.15.0, x64)

Scenarios

Angular - node (v18.15.0, x64)
Compiler-Unions - node (v18.15.0, x64)
Monaco - node (v18.15.0, x64)
TFS - node (v18.15.0, x64)
material-ui - node (v18.15.0, x64)
mui-docs - node (v18.15.0, x64)
self-build-src - node (v18.15.0, x64)
self-compiler - node (v18.15.0, x64)
vscode - node (v18.15.0, x64)
webpack - node (v18.15.0, x64)
xstate - node (v18.15.0, x64)

_Benchmark	_Name	_Iterations
_Current	_pr	₆
_Baseline	_baseline	₆

Developer Information:

Download Benchmarks

TypeScript Bot (typescript-bot) · 2024-03-29T05:31:50Z

Jake Bailey (@jakebailey) Here are the results of running the top 400 repos comparing main and refs/pull/57996/merge:

Everything looks good!

…stEnums

TypeScript Bot (typescript-bot) assigned Jake Bailey (jakebailey)Mar 29, 2024

TypeScript Bot (typescript-bot) added Author: Team For Uncommitted Bug PR for untriaged, rejected, closed or missing bug labels Mar 29, 2024

Jake Bailey (jakebailey) commented Mar 29, 2024
View reviewed changes

Comment threadsrc/compiler/checker.ts Outdated

Jake Bailey (jakebailey)force-pushed the const-enum-value branch from bf0ee11 to c83323bCompare March 29, 2024 17:59

Jake Bailey (jakebailey) added 2 commits March 29, 2024 11:01

Test
7f5299b

Allow references to const enums when provably emitted via preserveCon…
36042d8
…stEnums

Jake Bailey (jakebailey)force-pushed the const-enum-value branch from c83323b to 36042d8Compare March 29, 2024 18:02

Jake Bailey (jakebailey) marked this pull request as ready for review March 29, 2024 19:01

Jake Bailey (jakebailey) marked this pull request as draft March 29, 2024 19:01

Allow ambient again
faba9bd

Daniel Rosenwasser (DanielRosenwasser) mentioned this pull request May 2, 2024
Design Meeting Notes, 3/29/2024 #58412
Closed

Jake Bailey (jakebailey) added 3 commits August 16, 2024 11:09

Merge branch 'main' into const-enum-value
fed9d9e

baseline
48565f0

Don't always do it
5241730

Jake Bailey (jakebailey) closed this Apr 1, 2025

Microsoft (microsoft) locked as resolved and limited conversation to collaborators Oct 16, 2025

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Allow references to const enums when provably emitted via preserveConstEnums - #57996

Allow references to const enums when provably emitted via preserveConstEnums#57996
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