Reject non-access targets early when matching access references by jakebailey · Pull Request #65045 · microsoft/TypeScript

Jake Bailey (jakebailey) · 2026-10-29T23:29:32Z

Just some logic moving to avoid work.

Co-authored-by: Steven Chong <[email protected]>

Jake Bailey (jakebailey) · 2026-10-29T23:29:44Z

TypeScript Bot (@typescript-bot) perf test this faster

typescript-automation · 2026-10-29T23:29:48Z

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

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

Copilot

🟢 Approval recommended

No active review issues remain for the access-reference matching change.

No open issues 🎉

What changed in this PR

This PR streamlines access-reference matching in the native TypeScript checker by rejecting non-access targets before resolving property names.

Changes:

Moves the target access-expression check earlier to avoid unnecessary work.
Removes redundant nesting around property-name comparison.

File	Description
`tsc/internal/checker/flow.go`	Adds an early return for non-access targets in `isMatchingReference`.

_{Review effort: Balanced}

typescript-automation · 2026-10-30T00:21:46Z

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 - native}
_Errors	₄₁	₄₁	_~	_~	_~	_{p=1.000 n=20}
_Symbols	_88,466	_88,466	_~	_~	_~	_{p=1.000 n=20}
_Types	_79,607	_79,607	_~	_~	_~	_{p=1.000 n=20}
_{Memory Used}	_{104,171k (± 0.02%)}	_{104,146k (± 0.03%)}	_~	_104,030k	_104,290k	_{p=0.119 n=20}
_{Memory Allocs}	_{1,263,809 (± 0.01%)}	_{1,263,748 (± 0.00%)}	_~	_1,263,585	_1,263,954	_{p=0.144 n=20}
_{Config Time}	_0.000s	_0.000s	_~	_~	_~	_{p=1.000 n=20}
_{Parse Time}	_{0.023s (± 2.91%)}	_{0.023s (± 3.58%)}	_~	_0.020s	_0.029s	_{p=0.897 n=20}
_{Bind Time}	_{0.008s (± 5.34%)}	_{0.008s (± 5.41%)}	_~	_0.007s	_0.010s	_{p=0.803 n=20}
_{Check Time}	_{0.213s (± 0.98%)}	_{0.211s (± 0.57%)}	_~	_0.206s	_0.215s	_{p=0.182 n=20}
_{Emit Time}	_{0.137s (± 1.36%)}	_{0.137s (± 0.91%)}	_~	_0.132s	_0.143s	_{p=0.845 n=20}
_{Total Time}	_{0.385s (± 0.63%)}	_{0.382s (± 0.49%)}	_~	_0.376s	_0.393s	_{p=0.124 n=20}
_{angular-1 - native}
_Errors	₃	₃	_~	_~	_~	_{p=1.000 n=20}
_Symbols	_{586,573 (± 0.02%)}	_{586,556 (± 0.01%)}	_~	_586,317	_586,912	_{p=0.640 n=20}
_Types	_{241,687 (± 0.00%)}	_{241,683 (± 0.00%)}	_{-4 (- 0.00%)}	_241,680	_241,686	_{p=0.000 n=20}
_{Memory Used}	_{517,907k (± 0.02%)}	_{518,012k (± 0.02%)}	_~	_517,620k	_518,433k	_{p=0.096 n=20}
_{Memory Allocs}	_{7,799,812 (± 0.14%)}	_{7,792,693 (± 0.04%)}	_~	_7,785,106	_7,804,906	_{p=0.799 n=20}
_{Config Time}	_0.009s	_0.009s	_~	_~	_~	_{p=1.000 n=20}
_{Parse Time}	_{0.125s (± 2.26%)}	_{0.127s (± 4.13%)}	_~	_0.120s	_0.159s	_{p=0.920 n=20}
_{Bind Time}	_{0.045s (±10.17%)}	_{0.042s (± 9.47%)}	_~	_0.036s	_0.064s	_{p=0.247 n=20}
_{Check Time}	_0s	_0s	_~	_~	_~	_{p=1.000 n=20}
_{Emit Time}	_{0.848s (± 1.04%)}	_{0.845s (± 0.81%)}	_~	_0.827s	_0.876s	_{p=0.804 n=20}
_{Total Time}	_{1.037s (± 1.19%)}	_{1.033s (± 1.01%)}	_~	_1.007s	_1.081s	_{p=0.713 n=20}
_{arktype - native}
_Errors	₀	₀	_~	_~	_~	_{p=1.000 n=20}
_Symbols	_685,920	_685,920	_~	_~	_~	_{p=1.000 n=20}
_Types	_939,467	_939,467	_~	_~	_~	_{p=1.000 n=20}
_{Memory Used}	_{497,298k (± 0.01%)}	_{497,290k (± 0.01%)}	_~	_497,083k	_497,523k	_{p=0.743 n=20}
_{Memory Allocs}	_{12,107,681 (± 0.01%)}	_{12,106,985 (± 0.01%)}	_~	_12,104,479	_12,113,816	_{p=0.337 n=20}
_{Config Time}	_0.001s	_0.001s	_~	_~	_~	_{p=1.000 n=20}
_{Parse Time}	_{0.041s (± 2.17%)}	_{0.040s (± 3.17%)}	_~	_0.035s	_0.047s	_{p=0.511 n=20}
_{Bind Time}	_{0.013s (± 8.47%)}	_{0.014s (± 9.30%)}	_~	_0.012s	_0.021s	_{p=0.124 n=20}
_{Check Time}	_{1.000s (± 0.39%)}	_{1.001s (± 0.55%)}	_~	_0.971s	_1.025s	_{p=0.387 n=20}
_{Emit Time}	_0.000s	_0.000s	_~	_~	_~	_{p=1.000 n=20}
_{Total Time}	_{1.083s (± 0.30%)}	_{1.085s (± 0.43%)}	_~	_1.063s	_1.105s	_{p=0.330 n=20}
_{class-transformer - native}
_Errors	₀	₀	_~	_~	_~	_{p=1.000 n=20}
_Symbols	_45,376	_45,376	_~	_~	_~	_{p=1.000 n=20}
_Types	_7,573	_7,573	_~	_~	_~	_{p=1.000 n=20}
_{Memory Used}	_{27,835k (± 0.02%)}	_{27,837k (± 0.02%)}	_~	_27,808k	_27,862k	_{p=0.578 n=20}
_{Memory Allocs}	_{248,555 (± 0.05%)}	_{248,554 (± 0.05%)}	_~	_248,066	_249,062	_{p=0.904 n=20}
_{Config Time}	_0.000s	_0.000s	_~	_~	_~	_{p=1.000 n=20}
_{Parse Time}	_{0.012s (± 3.19%)}	_{0.011s (± 3.06%)}	_~	_0.010s	_0.012s	_{p=0.158 n=20}
_{Bind Time}	_{0.003s (±10.34%)}	_{0.004s (±12.63%)}	_~	_0.003s	_0.006s	_{p=0.480 n=20}
_{Check Time}	_{0.008s (± 5.01%)}	_{0.008s (± 4.83%)}	_~	_0.007s	_0.009s	_{p=0.306 n=20}
_{Emit Time}	_{0.008s (± 6.32%)}	_{0.009s (± 5.67%)}	_~	_0.007s	_0.010s	_{p=0.268 n=20}
_{Total Time}	_{0.032s (± 1.97%)}	_{0.032s (± 1.73%)}	_~	_0.030s	_0.034s	_{p=0.945 n=20}
_{effect - native}
_Errors	₁₂	₁₂	_~	_~	_~	_{p=1.000 n=20}
_Symbols	_1,235,115	_1,235,115	_~	_~	_~	_{p=1.000 n=20}
_Types	_894,113	_894,113	_~	_~	_~	_{p=1.000 n=20}
_{Memory Used}	_{940,438k (± 0.02%)}	_{940,430k (± 0.02%)}	_~	_939,710k	_941,478k	_{p=0.826 n=20}
_{Memory Allocs}	_{12,669,636 (± 0.02%)}	_{12,673,105 (± 0.04%)}	_~	_12,663,302	_12,712,110	_{p=0.355 n=20}
_{Config Time}	_{0.002s (± 5.09%)}	_{0.002s (± 5.09%)}	_~	_0.002s	_0.003s	_{p=1.000 n=20}
_{Parse Time}	_{0.154s (± 4.33%)}	_{0.158s (± 3.91%)}	_~	_0.143s	_0.203s	_{p=0.118 n=20}
_{Bind Time}	_0.000s	_0.000s	_~	_~	_~	_{p=1.000 n=20}
_{Check Time}	_{0.973s (± 1.14%)}	_{0.974s (± 1.35%)}	_~	_0.932s	_1.036s	_{p=0.973 n=20}
_{Emit Time}	_{0.514s (± 2.89%)}	_{0.519s (± 2.69%)}	_~	_0.458s	_0.568s	_{p=0.588 n=20}
_{Total Time}	_{1.744s (± 1.45%)}	_{1.749s (± 1.28%)}	_~	_1.683s	_1.854s	_{p=0.673 n=20}
_{mui-docs - native}
_Errors	_11,405	_11,405	_~	_~	_~	_{p=1.000 n=20}
_Symbols	_3,784,019	_3,784,019	_~	_~	_~	_{p=1.000 n=20}
_Types	_1,355,974	_1,355,974	_~	_~	_~	_{p=1.000 n=20}
_{Memory Used}	_{1,835,869k (± 0.07%)}	_{1,835,571k (± 0.08%)}	_~	_1,830,920k	_1,842,884k	_{p=0.512 n=20}
_{Memory Allocs}	_{26,006,561 (± 0.17%)}	_{25,994,134 (± 0.10%)}	_~	_25,906,320	_26,119,580	_{p=0.989 n=20}
_{Config Time}	_{0.008s (± 2.64%)}	_{0.009s (± 2.82%)}	_~	_0.008s	_0.009s	_{p=0.333 n=20}
_{Parse Time}	_{0.302s (± 2.20%)}	_{0.302s (± 1.73%)}	_~	_0.273s	_0.317s	_{p=0.723 n=20}
_{Bind Time}	_{0.001s (±18.96%)}	_0.001s	_~	_~	_~	_{p=1.000 n=20}
_{Check Time}	_{3.117s (± 1.28%)}	_{3.138s (± 1.49%)}	_~	_3.005s	_3.321s	_{p=0.490 n=20}
_{Emit Time}	_{0.255s (± 4.69%)}	_{0.249s (± 1.74%)}	_~	_0.232s	_0.268s	_{p=0.825 n=20}
_{Total Time}	_{4.179s (± 1.25%)}	_{4.191s (± 1.38%)}	_~	_3.993s	_4.412s	_{p=0.753 n=20}
_{sentry - native}
_Errors	₂	₂	_~	_~	_~	_{p=1.000 n=20}
_Symbols	_4,793,245	_4,793,245	_~	_~	_~	_{p=1.000 n=20}
_Types	_2,607,045	_2,606,905	_{-140 (- 0.01%)}	_~	_~	_{p=0.000 n=20}
_{Memory Used}	_{2,880,404k (± 0.03%)}	_{2,880,896k (± 0.02%)}	_~	_2,878,925k	_2,883,308k	_{p=0.174 n=20}
_{Memory Allocs}	_{75,422,722 (± 0.26%)}	_{75,450,423 (± 0.32%)}	_~	_74,872,225	_76,667,588	_{p=0.947 n=20}
_{Config Time}	_{0.026s (± 1.37%)}	_{0.026s (± 1.48%)}	_~	_0.025s	_0.028s	_{p=0.911 n=20}
_{Parse Time}	_{0.498s (± 3.84%)}	_{0.491s (± 2.68%)}	_~	_0.443s	_0.534s	_{p=0.743 n=20}
_{Bind Time}	_{0.157s (± 8.98%)}	_{0.167s (±11.12%)}	_~	_0.138s	_0.268s	_{p=0.228 n=20}
_{Check Time}	_{6.843s (± 1.02%)}	_{6.845s (± 1.27%)}	_~	_6.645s	_7.255s	_{p=0.565 n=20}
_{Emit Time}	_0.000s	_0.000s	_~	_~	_~	_{p=1.000 n=20}
_{Total Time}	_{7.574s (± 0.95%)}	_{7.579s (± 1.15%)}	_~	_7.366s	_7.993s	_{p=0.774 n=20}
_{social-app - native}
_Errors	₀	₀	_~	_~	_~	_{p=1.000 n=20}
_Symbols	_1,883,074	_1,883,074	_~	_~	_~	_{p=1.000 n=20}
_Types	_1,158,168	_1,158,168	_~	_~	_~	_{p=1.000 n=20}
_{Memory Used}	_{972,523k (± 0.01%)}	_{972,406k (± 0.01%)}	_~	_971,733k	_972,873k	_{p=0.157 n=20}
_{Memory Allocs}	_{13,577,538 (± 0.18%)}	_{13,563,310 (± 0.10%)}	_~	_13,521,333	_13,620,542	_{p=0.640 n=20}
_{Config Time}	_0.008s	_0.008s	_~	_~	_~	_{p=1.000 n=20}
_{Parse Time}	_{0.158s (± 2.25%)}	_{0.162s (± 4.28%)}	_~	_0.145s	_0.202s	_{p=0.615 n=20}
_{Bind Time}	_{0.046s (± 7.33%)}	_{0.048s (±11.91%)}	_~	_0.038s	_0.075s	_{p=0.887 n=20}
_{Check Time}	_{1.465s (± 0.53%)}	_{1.478s (± 0.51%)}	_{+0.012s (+ 0.85%)}	_1.440s	_1.507s	_{p=0.014 n=20}
_{Emit Time}	_0.000s	_0.000s	_~	_~	_~	_{p=1.000 n=20}
_{Total Time}	_{1.697s (± 0.43%)}	_{1.713s (± 0.73%)}	_~	_1.676s	_1.785s	_{p=0.062 n=20}
_{strada-build-src - native}
_Errors	₀	₀	_~	_~	_~	_{p=1.000 n=20}
_Symbols	_1,184,972	_1,184,972	_~	_~	_~	_{p=1.000 n=20}
_Types	_438,963	_438,959	_{-4 (- 0.00%)}	_~	_~	_{p=0.000 n=20}
_{Memory Used}	_{1,171,018k (± 0.30%)}	_{1,173,266k (± 0.44%)}	_~	_1,157,442k	_1,193,837k	_{p=0.640 n=20}
_{Memory Allocs}	_{47,741,394 (± 0.12%)}	_{47,797,616 (± 0.12%)}	_~	_47,543,274	_48,023,742	_{p=0.192 n=20}
_{Config Time}	_{0.001s (±30.45%)}	_{0.002s (±18.87%)}	_{🔻+0.000s (+36.36%)}	_0.000s	_0.002s	_{p=0.040 n=20}
_{Parse Time}	_{0.153s (± 1.60%)}	_{0.151s (± 2.30%)}	_~	_0.140s	_0.169s	_{p=0.560 n=20}
_{Bind Time}	_0.000s	_{0.000s (±208.60%)}	_~	_0.000s	_0.001s	_{p=1.000 n=20}
_{Check Time}	_{0.901s (± 0.83%)}	_{0.904s (± 1.86%)}	_~	_0.823s	_0.982s	_{p=0.379 n=20}
_{Emit Time}	_{0.154s (± 2.45%)}	_{0.160s (± 2.88%)}	_~	_0.139s	_0.178s	_{p=0.051 n=20}
_{Total Time}	_{10.508s (± 0.81%)}	_{10.580s (± 1.98%)}	_~	_9.489s	_11.549s	_{p=0.201 n=20}
_{strada-compiler - native}
_Errors	₀	₀	_~	_~	_~	_{p=1.000 n=20}
_Symbols	_263,511	_263,511	_~	_~	_~	_{p=1.000 n=20}
_Types	_196,116	_196,116	_~	_~	_~	_{p=1.000 n=20}
_{Memory Used}	_{224,601k (± 0.02%)}	_{224,601k (± 0.02%)}	_~	_224,387k	_224,801k	_{p=0.952 n=20}
_{Memory Allocs}	_{2,401,407 (± 0.01%)}	_{2,401,403 (± 0.02%)}	_~	_2,399,830	_2,403,106	_{p=0.941 n=20}
_{Config Time}	_0.000s	_0.000s	_~	_~	_~	_{p=1.000 n=20}
_{Parse Time}	_{0.049s (± 2.38%)}	_{0.050s (± 3.56%)}	_~	_0.044s	_0.058s	_{p=0.342 n=20}
_{Bind Time}	_0.000s	_0.000s	_~	_~	_~	_{p=1.000 n=20}
_{Check Time}	_{0.379s (± 1.00%)}	_{0.377s (± 0.70%)}	_~	_0.369s	_0.389s	_{p=0.909 n=20}
_{Emit Time}	_{0.047s (± 5.11%)}	_{0.048s (± 4.74%)}	_~	_0.041s	_0.056s	_{p=0.548 n=20}
_{Total Time}	_{0.503s (± 0.76%)}	_{0.504s (± 0.60%)}	_~	_0.492s	_0.514s	_{p=0.480 n=20}
_{t3code-server - native}
_Errors	₀	₀	_~	_~	_~	_{p=1.000 n=20}
_Symbols	_4,350,661	_4,350,661	_~	_~	_~	_{p=1.000 n=20}
_Types	_3,040,644	_3,040,644	_~	_~	_~	_{p=1.000 n=20}
_{Memory Used}	_{2,433,528k (± 0.02%)}	_{2,433,328k (± 0.02%)}	_~	_2,431,398k	_2,434,917k	_{p=0.883 n=20}
_{Memory Allocs}	_{37,374,404 (± 0.05%)}	_{37,401,957 (± 0.09%)}	_~	_37,304,845	_37,607,831	_{p=0.314 n=20}
_{Config Time}	_0.003s	_0.003s	_~	_~	_~	_{p=1.000 n=20}
_{Parse Time}	_{0.253s (± 2.53%)}	_{0.258s (± 2.73%)}	_~	_0.230s	_0.291s	_{p=0.324 n=20}
_{Bind Time}	_{0.094s (±11.13%)}	_{0.092s (± 8.65%)}	_~	_0.080s	_0.140s	_{p=0.408 n=20}
_{Check Time}	_{7.500s (± 0.64%)}	_{7.460s (± 0.49%)}	_~	_7.309s	_7.589s	_{p=0.311 n=20}
_{Emit Time}	_0.000s	_0.000s	_~	_~	_~	_{p=1.000 n=20}
_{Total Time}	_{7.863s (± 0.60%)}	_{7.824s (± 0.50%)}	_~	_7.679s	_7.968s	_{p=0.251 n=20}
_{tanstack-router - native}
_Errors	₁	₁	_~	_~	_~	_{p=1.000 n=20}
_Symbols	_571,756	_571,756	_~	_~	_~	_{p=1.000 n=20}
_Types	_397,689	_397,689	_~	_~	_~	_{p=1.000 n=20}
_{Memory Used}	_{331,390k (± 0.01%)}	_{331,384k (± 0.02%)}	_~	_331,139k	_331,565k	_{p=0.846 n=20}
_{Memory Allocs}	_{4,387,903 (± 0.15%)}	_{4,388,531 (± 0.17%)}	_~	_4,376,287	_4,444,488	_{p=0.758 n=20}
_{Config Time}	_0.001s	_{0.001s (± 9.93%)}	_~	_0.001s	_0.002s	_{p=1.000 n=20}
_{Parse Time}	_{0.039s (± 3.06%)}	_{0.042s (± 3.59%)}	_{🔻+0.003s (+ 6.48%)}	_0.036s	_0.047s	_{p=0.012 n=20}
_{Bind Time}	_{0.014s (±10.72%)}	_{0.013s (±12.09%)}	_~	_0.011s	_0.021s	_{p=0.481 n=20}
_{Check Time}	_{0.567s (± 0.78%)}	_{0.578s (± 1.48%)}	_{+0.011s (+ 1.91%)}	_0.553s	_0.624s	_{p=0.037 n=20}
_{Emit Time}	_0.000s	_0.000s	_~	_~	_~	_{p=1.000 n=20}
_{Total Time}	_{0.640s (± 0.84%)}	_{0.655s (± 1.70%)}	_{+0.015s (+ 2.40%)}	_0.628s	_0.723s	_{p=0.017 n=20}
_{ts-pre-modules - native}
_Errors	₈₇	₈₇	_~	_~	_~	_{p=1.000 n=20}
_Symbols	_231,616	_231,616	_~	_~	_~	_{p=1.000 n=20}
_Types	_181,195	_181,195	_~	_~	_~	_{p=1.000 n=20}
_{Memory Used}	_{193,548k (± 0.02%)}	_{193,534k (± 0.01%)}	_~	_193,435k	_193,619k	_{p=0.465 n=20}
_{Memory Allocs}	_{1,317,998 (± 0.01%)}	_{1,318,031 (± 0.02%)}	_~	_1,317,295	_1,319,167	_{p=0.941 n=20}
_{Config Time}	_0.000s	_0.000s	_~	_~	_~	_{p=1.000 n=20}
_{Parse Time}	_{0.043s (± 2.50%)}	_{0.044s (± 3.53%)}	_~	_0.038s	_0.049s	_{p=0.731 n=20}
_{Bind Time}	_{0.020s (± 6.56%)}	_{0.020s (± 5.16%)}	_~	_0.017s	_0.025s	_{p=0.443 n=20}
_{Check Time}	_{0.294s (± 0.70%)}	_{0.295s (± 0.70%)}	_~	_0.284s	_0.303s	_{p=0.691 n=20}
_{Emit Time}	_0.000s	_0.000s	_~	_~	_~	_{p=1.000 n=20}
_{Total Time}	_{0.363s (± 0.48%)}	_{0.365s (± 0.56%)}	_~	_0.353s	_0.371s	_{p=0.078 n=20}
_{vscode - native}
_Errors	₁₁	₁₁	_~	_~	_~	_{p=1.000 n=20}
_Symbols	_7,501,141	_7,501,141	_~	_~	_~	_{p=1.000 n=20}
_Types	_4,403,999	_4,403,982	_{-17 (- 0.00%)}	_~	_~	_{p=0.000 n=20}
_{Memory Used}	_{5,209,548k (± 0.01%)}	_{5,210,028k (± 0.02%)}	_~	_5,206,682k	_5,215,103k	_{p=0.461 n=20}
_{Memory Allocs}	_{57,188,054 (± 0.03%)}	_{57,183,404 (± 0.02%)}	_~	_57,160,410	_57,268,602	_{p=0.529 n=20}
_{Config Time}	_{0.034s (± 1.78%)}	_{0.035s (± 6.95%)}	_~	_0.032s	_0.057s	_{p=0.382 n=20}
_{Parse Time}	_{0.906s (± 1.86%)}	_{0.901s (± 2.17%)}	_~	_0.800s	_0.985s	_{p=0.525 n=20}
_{Bind Time}	_{0.332s (± 6.43%)}	_{0.346s (± 9.81%)}	_~	_0.304s	_0.550s	_{p=0.551 n=20}
_{Check Time}	_{8.075s (± 0.67%)}	_{8.065s (± 0.74%)}	_~	_7.747s	_8.238s	_{p=0.995 n=20}
_{Emit Time}	_{2.849s (± 4.86%)}	_{2.939s (± 6.06%)}	_~	_2.661s	_3.760s	_{p=0.410 n=20}
_{Total Time}	_{12.256s (± 0.93%)}	_{12.346s (± 1.26%)}	_~	_11.966s	_13.156s	_{p=0.433 n=20}
_{webpack - native}
_Errors	₆₁₆	₆₁₆	_~	_~	_~	_{p=1.000 n=20}
_Symbols	_923,808	_923,808	_~	_~	_~	_{p=1.000 n=20}
_Types	_649,949	_649,949	_~	_~	_~	_{p=1.000 n=20}
_{Memory Used}	_{698,706k (± 0.01%)}	_{698,727k (± 0.02%)}	_~	_698,035k	_699,236k	_{p=0.547 n=20}
_{Memory Allocs}	_{6,570,713 (± 0.04%)}	_{6,572,952 (± 0.05%)}	_~	_6,563,897	_6,584,824	_{p=0.314 n=20}
_{Config Time}	_0.004s	_0.004s	_~	_~	_~	_{p=1.000 n=20}
_{Parse Time}	_{0.141s (± 2.74%)}	_{0.142s (± 2.98%)}	_~	_0.129s	_0.166s	_{p=0.984 n=20}
_{Bind Time}	_{0.047s (± 9.33%)}	_{0.044s (± 9.48%)}	_~	_0.037s	_0.068s	_{p=0.093 n=20}
_{Check Time}	_{1.071s (± 0.83%)}	_{1.077s (± 1.17%)}	_~	_1.051s	_1.148s	_{p=0.941 n=20}
_{Emit Time}	_0.000s	_0.000s	_~	_~	_~	_{p=1.000 n=20}
_{Total Time}	_{1.288s (± 0.82%)}	_{1.290s (± 1.21%)}	_~	_1.255s	_1.383s	_{p=0.587 n=20}
_{xstate-main - native}
_Errors	₀	₀	_~	_~	_~	_{p=1.000 n=20}
_Symbols	_640,490	_640,490	_~	_~	_~	_{p=1.000 n=20}
_Types	_387,984	_387,984	_~	_~	_~	_{p=1.000 n=20}
_{Memory Used}	_{350,934k (± 0.02%)}	_{350,892k (± 0.02%)}	_~	_350,492k	_351,177k	_{p=0.383 n=20}
_{Memory Allocs}	_{3,991,481 (± 0.07%)}	_{3,990,896 (± 0.06%)}	_~	_3,984,116	_3,999,533	_{p=0.779 n=20}
_{Config Time}	_0.001s	_0.001s	_~	_~	_~	_{p=1.000 n=20}
_{Parse Time}	_{0.060s (± 2.86%)}	_{0.061s (± 2.83%)}	_~	_0.055s	_0.068s	_{p=0.226 n=20}
_{Bind Time}	_{0.020s (± 8.66%)}	_{0.023s (±12.83%)}	_~	_0.018s	_0.034s	_{p=0.147 n=20}
_{Check Time}	_{0.424s (± 0.66%)}	_{0.426s (± 0.99%)}	_~	_0.412s	_0.444s	_{p=0.577 n=20}
_{Emit Time}	_0.000s	_0.000s	_~	_~	_~	_{p=1.000 n=20}
_{Total Time}	_{0.510s (± 0.63%)}	_{0.517s (± 1.02%)}	_~	_0.499s	_0.534s	_{p=0.068 n=20}

System info unknown

Hosts

native

Scenarios

Compiler-Unions - native
angular-1 - native
arktype - native
class-transformer - native
effect - native
mui-docs - native
sentry - native
social-app - native
strada-build-src - native
strada-compiler - native
t3code-server - native
tanstack-router - native
ts-pre-modules - native
vscode - native
webpack - native
xstate-main - native

_Benchmark	_Name	_Iterations
_Current	_pr	₂₀
_Baseline	_baseline	₂₀

Developer Information:

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Reject non-access targets early when matching access references

fe49c5d

Co-authored-by: Steven Chong <[email protected]>

Copilot AI balanced review requested due to automatic review settings October 29, 2026 23:29

github-project-automation Bot added this to PR Backlog Oct 29, 2026

typescript-automation Bot assigned Jake Bailey (jakebailey) Oct 29, 2026

github-project-automation Bot moved this to Not started in PR Backlog Oct 29, 2026

typescript-automation Bot added Author: Team For Uncommitted Bug PR for untriaged, rejected, closed or missing bug labels Oct 29, 2026

Copilot started reviewing on behalf of Jake Bailey (jakebailey) October 29, 2026 23:32

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Jake Bailey (jakebailey) added the Domain: Performance Reports of unusually slow behavior label Oct 30, 2026

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Reject non-access targets early when matching access references - #65045

Reject non-access targets early when matching access references#65045
Jake Bailey (jakebailey) wants to merge 1 commit into
microsoft:mainfrom
jakebailey:perf/matching-reference-access

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Jake Bailey (jakebailey) commented Oct 29, 2026

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