Keep track of multiple current inference contexts

[ahejlsberg]

Fixes #51970.

[DanielRosenwasser]

Why does the example in #51970 require multiple inference contexts? What broke it?

[DanielRosenwasser]

@typescript-bot perf test this

[typescript-bot]

Heya @DanielRosenwasser, I've started to run the perf test suite on this PR at b3f76af. You can monitor the build here.

Update: The results are in!

[typescript-bot]

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

Here they are:

Compiler

Comparison Report - main..51978

Metric	main	51978	Delta	Best	Worst
Angular - node (v18.10.0, x64)
Memory used	372,315k (± 0.01%)	372,317k (± 0.01%)	+2k (+ 0.00%)	372,270k	372,343k
Parse Time	3.95s (± 1.06%)	3.94s (± 0.82%)	-0.01s (- 0.37%)	3.90s	3.99s
Bind Time	1.20s (± 0.83%)	1.21s (± 1.33%)	+0.00s (+ 0.11%)	1.19s	1.23s
Check Time	8.60s (± 0.38%)	8.58s (± 0.49%)	-0.02s (- 0.26%)	8.51s	8.62s
Emit Time	7.60s (± 0.60%)	7.53s (± 0.58%)	-0.07s (- 0.88%)	7.47s	7.57s
Total Time	21.36s (± 0.37%)	21.26s (± 0.42%)	-0.10s (- 0.48%)	21.11s	21.35s
Compiler-Unions - node (v18.10.0, x64)
Memory used	200,893k (± 1.53%)	200,919k (± 1.52%)	+26k (+ 0.01%)	198,110k	203,740k
Parse Time	1.66s (± 0.95%)	1.63s (± 1.56%)	-0.03s (- 1.87%)	1.60s	1.65s
Bind Time	0.79s (± 0.62%)	0.79s (± 0.70%)	-0.00s (- 0.29%)	0.79s	0.80s
Check Time	9.46s (± 0.52%)	9.47s (± 1.04%)	+0.01s (+ 0.11%)	9.37s	9.65s
Emit Time	2.77s (± 1.09%)	2.79s (± 0.93%)	+0.01s (+ 0.49%)	2.76s	2.83s
Total Time	14.69s (± 0.42%)	14.68s (± 0.73%)	-0.01s (- 0.06%)	14.55s	14.87s
Monaco - node (v18.10.0, x64)
Memory used	353,974k (± 0.01%)	353,930k (± 0.01%)	-44k (- 0.01%)	353,893k	353,967k
Parse Time	2.94s (± 1.44%)	2.96s (± 1.09%)	+0.01s (+ 0.37%)	2.90s	2.99s
Bind Time	1.04s (± 1.30%)	1.03s (± 1.44%)	-0.01s (- 0.92%)	1.02s	1.06s
Check Time	7.22s (± 0.54%)	7.20s (± 0.38%)	-0.02s (- 0.26%)	7.17s	7.24s
Emit Time	4.27s (± 0.74%)	4.27s (± 0.43%)	-0.00s (- 0.04%)	4.24s	4.29s
Total Time	15.47s (± 0.75%)	15.45s (± 0.33%)	-0.02s (- 0.11%)	15.38s	15.54s
TFS - node (v18.10.0, x64)
Memory used	309,854k (± 0.01%)	309,869k (± 0.00%)	+15k (+ 0.00%)	309,847k	309,885k
Parse Time	2.24s (± 1.27%)	2.25s (± 1.31%)	+0.01s (+ 0.22%)	2.20s	2.29s
Bind Time	1.16s (± 0.72%)	1.16s (± 0.41%)	+0.01s (+ 0.59%)	1.16s	1.17s
Check Time	6.81s (± 0.24%)	6.81s (± 0.58%)	+0.00s (+ 0.03%)	6.76s	6.86s
Emit Time	3.93s (± 0.83%)	3.92s (± 0.57%)	-0.01s (- 0.17%)	3.89s	3.94s
Total Time	14.13s (± 0.49%)	14.14s (± 0.28%)	+0.01s (+ 0.05%)	14.08s	14.18s
material-ui - node (v18.10.0, x64)
Memory used	485,040k (± 0.01%)	485,038k (± 0.01%)	-2k (- 0.00%)	484,999k	485,092k
Parse Time	3.55s (± 0.97%)	3.52s (± 0.64%)	-0.03s (- 0.78%)	3.50s	3.56s
Bind Time	0.96s (± 0.61%)	0.96s (± 1.33%)	+0.00s (+ 0.07%)	0.96s	0.99s
Check Time	16.92s (± 0.26%)	16.94s (± 0.48%)	+0.02s (+ 0.10%)	16.84s	17.05s
Emit Time	0.00s (± 0.00%)	0.00s (± 0.00%)	0.00s ( NaN%)	0.00s	0.00s
Total Time	21.43s (± 0.32%)	21.42s (± 0.43%)	-0.01s (- 0.05%)	21.31s	21.51s
xstate - node (v18.10.0, x64)
Memory used	569,641k (± 0.01%)	569,656k (± 0.02%)	+15k (+ 0.00%)	569,503k	569,754k
Parse Time	4.44s (± 0.66%)	4.42s (± 0.46%)	-0.02s (- 0.54%)	4.39s	4.45s
Bind Time	1.70s (± 1.12%)	1.69s (± 0.99%)	-0.01s (- 0.49%)	1.68s	1.72s
Check Time	2.61s (± 0.35%)	2.60s (± 0.70%)	-0.01s (- 0.22%)	2.57s	2.62s
Emit Time	0.08s (± 0.24%)	0.08s (± 0.20%)	+0.00s (+ 0.10%)	0.08s	0.08s
Total Time	8.82s (± 0.26%)	8.80s (± 0.37%)	-0.03s (- 0.31%)	8.76s	8.84s
Angular - node (v16.17.1, x64)
Memory used	371,685k (± 0.01%)	371,648k (± 0.01%)	-37k (- 0.01%)	371,594k	371,676k
Parse Time	4.14s (± 0.24%)	4.13s (± 0.40%)	-0.01s (- 0.13%)	4.11s	4.16s
Bind Time	1.27s (± 0.71%)	1.27s (± 0.49%)	+0.00s (+ 0.20%)	1.26s	1.28s
Check Time	9.30s (± 0.43%)	9.29s (± 0.45%)	-0.01s (- 0.08%)	9.23s	9.35s
Emit Time	8.01s (± 0.57%)	8.01s (± 0.89%)	+0.00s (+ 0.05%)	7.90s	8.10s
Total Time	22.71s (± 0.30%)	22.70s (± 0.44%)	-0.01s (- 0.04%)	22.57s	22.81s
Compiler-Unions - node (v16.17.1, x64)
Memory used	200,905k (± 0.88%)	200,934k (± 0.88%)	+29k (+ 0.01%)	199,762k	203,348k
Parse Time	1.81s (± 0.60%)	1.80s (± 0.72%)	-0.00s (- 0.17%)	1.79s	1.83s
Bind Time	0.85s (± 0.57%)	0.84s (± 0.65%)	-0.00s (- 0.59%)	0.84s	0.85s
Check Time	10.21s (± 0.99%)	10.24s (± 0.61%)	+0.03s (+ 0.27%)	10.17s	10.34s
Emit Time	2.99s (± 0.74%)	3.07s (± 4.54%)	+0.08s (+ 2.70%)	2.97s	3.33s
Total Time	15.86s (± 0.59%)	15.95s (± 1.09%)	+0.10s (+ 0.61%)	15.79s	16.26s
Monaco - node (v16.17.1, x64)
Memory used	353,252k (± 0.01%)	353,256k (± 0.01%)	+4k (+ 0.00%)	353,209k	353,333k
Parse Time	3.15s (± 0.97%)	3.16s (± 1.16%)	+0.01s (+ 0.18%)	3.12s	3.21s
Bind Time	1.12s (± 0.71%)	1.12s (± 0.89%)	-0.01s (- 0.48%)	1.10s	1.13s
Check Time	7.85s (± 0.49%)	7.85s (± 0.44%)	-0.01s (- 0.08%)	7.80s	7.90s
Emit Time	4.51s (± 1.07%)	4.48s (± 0.74%)	-0.03s (- 0.77%)	4.44s	4.54s
Total Time	16.64s (± 0.60%)	16.60s (± 0.31%)	-0.04s (- 0.25%)	16.52s	16.67s
TFS - node (v16.17.1, x64)
Memory used	309,204k (± 0.00%)	309,210k (± 0.00%)	+7k (+ 0.00%)	309,190k	309,228k
Parse Time	2.61s (± 1.26%)	2.60s (± 0.83%)	-0.01s (- 0.57%)	2.56s	2.61s
Bind Time	1.06s (± 1.83%)	1.06s (± 1.41%)	+0.00s (+ 0.38%)	1.05s	1.09s
Check Time	7.42s (± 0.66%)	7.39s (± 0.43%)	-0.03s (- 0.40%)	7.36s	7.45s
Emit Time	4.21s (± 0.87%)	4.20s (± 0.64%)	-0.01s (- 0.25%)	4.16s	4.23s
Total Time	15.29s (± 0.56%)	15.24s (± 0.38%)	-0.06s (- 0.37%)	15.15s	15.29s
material-ui - node (v16.17.1, x64)
Memory used	484,323k (± 0.01%)	484,375k (± 0.02%)	+52k (+ 0.01%)	484,286k	484,520k
Parse Time	3.66s (± 0.42%)	3.68s (± 0.26%)	+0.02s (+ 0.46%)	3.67s	3.69s
Bind Time	1.01s (± 0.79%)	1.02s (± 0.76%)	+0.01s (+ 1.02%)	1.01s	1.03s
Check Time	17.96s (± 1.92%)	17.89s (± 0.21%)	-0.07s (- 0.39%)	17.85s	17.94s
Emit Time	0.00s (± 0.00%)	0.00s (± 0.00%)	0.00s ( NaN%)	0.00s	0.00s
Total Time	22.63s (± 1.60%)	22.58s (± 0.21%)	-0.05s (- 0.22%)	22.53s	22.66s
xstate - node (v16.17.1, x64)
Memory used	567,262k (± 0.02%)	567,352k (± 0.02%)	+90k (+ 0.02%)	567,181k	567,465k
Parse Time	4.76s (± 0.45%)	4.73s (± 0.17%)	-0.02s (- 0.48%)	4.72s	4.74s
Bind Time	1.67s (± 1.63%)	1.65s (± 0.41%)	-0.02s (- 1.13%)	1.64s	1.66s
Check Time	2.84s (± 0.61%)	2.81s (± 0.33%)	-0.02s (- 0.78%)	2.80s	2.82s
Emit Time	0.09s (± 4.67%)	0.09s (± 4.70%)	-0.00s (- 0.13%)	0.08s	0.09s
Total Time	9.35s (± 0.43%)	9.28s (± 0.14%)	-0.07s (- 0.70%)	9.26s	9.30s
Angular - node (v14.15.1, x64)
Memory used	365,246k (± 0.00%)	365,289k (± 0.01%)	+44k (+ 0.01%)	365,259k	365,312k
Parse Time	4.16s (± 0.58%)	4.17s (± 0.55%)	+0.01s (+ 0.19%)	4.14s	4.20s
Bind Time	1.30s (± 0.35%)	1.30s (± 0.66%)	+0.00s (+ 0.03%)	1.30s	1.32s
Check Time	9.67s (± 0.64%)	9.59s (± 0.33%)	-0.08s (- 0.84%)	9.56s	9.64s
Emit Time	8.21s (± 0.53%)	8.19s (± 0.56%)	-0.03s (- 0.33%)	8.14s	8.26s
Total Time	23.35s (± 0.49%)	23.25s (± 0.21%)	-0.11s (- 0.47%)	23.19s	23.32s
Compiler-Unions - node (v14.15.1, x64)
Memory used	194,954k (± 0.02%)	194,947k (± 0.01%)	-8k (- 0.00%)	194,911k	194,986k
Parse Time	1.86s (± 0.95%)	1.85s (± 0.95%)	-0.02s (- 0.92%)	1.83s	1.88s
Bind Time	0.88s (± 0.81%)	0.88s (± 1.00%)	-0.00s (- 0.22%)	0.87s	0.89s
Check Time	10.16s (± 0.64%)	10.12s (± 0.46%)	-0.04s (- 0.36%)	10.04s	10.17s
Emit Time	3.14s (± 1.11%)	3.14s (± 0.86%)	-0.01s (- 0.24%)	3.10s	3.17s
Total Time	16.04s (± 0.59%)	15.98s (± 0.50%)	-0.06s (- 0.37%)	15.86s	16.07s
Monaco - node (v14.15.1, x64)
Memory used	348,052k (± 0.01%)	348,079k (± 0.01%)	+28k (+ 0.01%)	348,058k	348,102k
Parse Time	3.25s (± 0.88%)	3.27s (± 1.06%)	+0.02s (+ 0.53%)	3.21s	3.32s
Bind Time	1.12s (± 0.61%)	1.12s (± 0.85%)	-0.00s (- 0.08%)	1.11s	1.13s
Check Time	8.20s (± 0.34%)	8.15s (± 0.48%)	-0.06s (- 0.72%)	8.09s	8.19s
Emit Time	4.75s (± 0.34%)	4.71s (± 0.70%)	-0.04s (- 0.84%)	4.66s	4.76s
Total Time	17.33s (± 0.35%)	17.24s (± 0.47%)	-0.08s (- 0.49%)	17.15s	17.35s
TFS - node (v14.15.1, x64)
Memory used	304,118k (± 0.01%)	304,122k (± 0.00%)	+4k (+ 0.00%)	304,107k	304,133k
Parse Time	2.72s (± 0.78%)	2.73s (± 0.53%)	+0.01s (+ 0.29%)	2.71s	2.75s
Bind Time	1.08s (± 0.26%)	1.08s (± 0.46%)	+0.01s (+ 0.47%)	1.08s	1.09s
Check Time	7.74s (± 0.66%)	7.71s (± 0.62%)	-0.04s (- 0.48%)	7.64s	7.76s
Emit Time	4.56s (± 0.87%)	4.56s (± 0.60%)	-0.00s (- 0.02%)	4.52s	4.59s
Total Time	16.10s (± 0.44%)	16.07s (± 0.52%)	-0.03s (- 0.19%)	15.95s	16.17s
material-ui - node (v14.15.1, x64)
Memory used	479,794k (± 0.00%)	479,776k (± 0.00%)	-18k (- 0.00%)	479,743k	479,798k
Parse Time	3.93s (± 0.98%)	3.87s (± 0.35%)	-0.05s (- 1.35%)	3.85s	3.89s
Bind Time	1.05s (± 0.49%)	1.04s (± 0.43%)	-0.01s (- 0.79%)	1.04s	1.05s
Check Time	19.13s (± 0.48%)	18.97s (± 0.77%)	-0.16s (- 0.83%)	18.85s	19.18s
Emit Time	0.00s (± 0.00%)	0.00s (± 0.00%)	0.00s ( NaN%)	0.00s	0.00s
Total Time	24.11s (± 0.31%)	23.89s (± 0.65%)	-0.22s (- 0.90%)	23.75s	24.09s
xstate - node (v14.15.1, x64)
Memory used	555,627k (± 0.00%)	555,612k (± 0.00%)	-15k (- 0.00%)	555,574k	555,636k
Parse Time	5.15s (± 0.80%)	5.10s (± 0.68%)	-0.06s (- 1.13%)	5.06s	5.14s
Bind Time	1.59s (± 0.74%)	1.59s (± 0.58%)	+0.00s (+ 0.07%)	1.57s	1.60s
Check Time	3.01s (± 0.42%)	2.99s (± 0.27%)	-0.02s (- 0.58%)	2.98s	3.00s
Emit Time	0.10s (± 0.10%)	0.10s (± 0.20%)	-0.00s (- 0.03%)	0.10s	0.10s
Total Time	9.85s (± 0.38%)	9.78s (± 0.43%)	-0.08s (- 0.81%)	9.73s	9.84s

System

Machine Name	ts-ci-ubuntu
Platform	linux 5.4.0-135-generic
Architecture	x64
Available Memory	16 GB
Available Memory	15 GB
CPUs	4 × Intel(R) Core(TM) i7-4770 CPU @ 3.40GHz

Hosts

• node (v18.10.0, x64)
• node (v16.17.1, x64)
• node (v14.15.1, x64)

Scenarios

• Angular - node (v18.10.0, x64)
• Angular - node (v16.17.1, x64)
• Angular - node (v14.15.1, x64)
• Compiler-Unions - node (v18.10.0, x64)
• Compiler-Unions - node (v16.17.1, x64)
• Compiler-Unions - node (v14.15.1, x64)
• Monaco - node (v18.10.0, x64)
• Monaco - node (v16.17.1, x64)
• Monaco - node (v14.15.1, x64)
• TFS - node (v18.10.0, x64)
• TFS - node (v16.17.1, x64)
• TFS - node (v14.15.1, x64)
• material-ui - node (v18.10.0, x64)
• material-ui - node (v16.17.1, x64)
• material-ui - node (v14.15.1, x64)
• xstate - node (v18.10.0, x64)
• xstate - node (v16.17.1, x64)
• xstate - node (v14.15.1, x64)

Benchmark	Name	Iterations
Current	51978	6
Baseline	main	6

TSServer

Comparison Report - main..51978

Metric	main	51978	Delta	Best	Worst
Compiler-UnionsTSServer - node (v18.10.0, x64)
Req 1 - updateOpen	2,545ms (± 1.87%)	2,552ms (± 1.05%)	+7ms (+ 0.26%)	2,508ms	2,577ms
Req 2 - geterr	5,676ms (± 0.62%)	5,641ms (± 0.85%)	-35ms (- 0.62%)	5,574ms	5,711ms
Req 3 - references	359ms (± 1.62%)	359ms (± 1.91%)	-0ms (- 0.02%)	352ms	372ms
Req 4 - navto	293ms (± 2.13%)	290ms (± 1.81%)	-3ms (- 1.05%)	280ms	294ms
Req 5 - completionInfo count	1,356 (± 0.00%)	1,356 (± 0.00%)	0 ( 0.00%)	1,356	1,356
Req 5 - completionInfo	80ms (± 9.21%)	80ms (± 5.84%)	+0ms (+ 0.21%)	75ms	87ms
CompilerTSServer - node (v18.10.0, x64)
Req 1 - updateOpen	2,738ms (± 1.14%)	2,749ms (± 1.37%)	+11ms (+ 0.39%)	2,700ms	2,802ms
Req 2 - geterr	4,173ms (± 0.80%)	4,138ms (± 0.41%)	-35ms (- 0.84%)	4,116ms	4,163ms
Req 3 - references	360ms (± 1.45%)	357ms (± 0.73%)	-3ms (- 0.89%)	354ms	360ms
Req 4 - navto	293ms (± 0.39%)	291ms (± 0.98%)	-2ms (- 0.55%)	288ms	296ms
Req 5 - completionInfo count	1,518 (± 0.00%)	1,518 (± 0.00%)	0 ( 0.00%)	1,518	1,518
Req 5 - completionInfo	66ms (± 2.40%)	66ms (± 1.04%)	+0ms (+ 0.54%)	65ms	67ms
xstateTSServer - node (v18.10.0, x64)
Req 1 - updateOpen	3,623ms (± 0.78%)	3,596ms (± 0.78%)	-27ms (- 0.74%)	3,546ms	3,628ms
Req 2 - geterr	1,316ms (± 1.20%)	1,320ms (± 1.23%)	+4ms (+ 0.28%)	1,301ms	1,345ms
Req 3 - references	105ms (± 2.73%)	107ms (± 2.36%)	+1ms (+ 1.01%)	103ms	110ms
Req 4 - navto	364ms (± 2.17%)	363ms (± 1.61%)	-1ms (- 0.32%)	356ms	371ms
Req 5 - completionInfo count	3,154 (± 0.00%)	3,154 (± 0.00%)	0 ( 0.00%)	3,154	3,154
Req 5 - completionInfo	434ms (± 1.30%)	432ms (± 2.42%)	-1ms (- 0.34%)	415ms	443ms
Compiler-UnionsTSServer - node (v16.17.1, x64)
Req 1 - updateOpen	2,778ms (± 0.94%)	2,772ms (± 0.77%)	-6ms (- 0.21%)	2,732ms	2,788ms
Req 2 - geterr	6,116ms (± 0.35%)	6,066ms (± 0.38%)	-50ms (- 0.81%)	6,031ms	6,091ms
Req 3 - references	366ms (± 0.73%)	365ms (± 0.61%)	-2ms (- 0.42%)	362ms	368ms
Req 4 - navto	279ms (± 0.93%)	278ms (± 1.12%)	-2ms (- 0.65%)	272ms	282ms
Req 5 - completionInfo count	1,356 (± 0.00%)	1,356 (± 0.00%)	0 ( 0.00%)	1,356	1,356
Req 5 - completionInfo	84ms (± 7.71%)	83ms (± 6.01%)	-1ms (- 1.04%)	80ms	93ms
CompilerTSServer - node (v16.17.1, x64)
Req 1 - updateOpen	2,918ms (± 1.02%)	2,900ms (± 0.36%)	-18ms (- 0.60%)	2,888ms	2,913ms
Req 2 - geterr	4,517ms (± 0.76%)	4,507ms (± 0.71%)	-10ms (- 0.23%)	4,474ms	4,538ms
Req 3 - references	387ms (± 0.37%)	384ms (± 0.63%)	-2ms (- 0.53%)	381ms	388ms
Req 4 - navto	295ms (± 1.56%)	291ms (± 0.96%)	-4ms (- 1.52%)	287ms	295ms
Req 5 - completionInfo count	1,518 (± 0.00%)	1,518 (± 0.00%)	0 ( 0.00%)	1,518	1,518
Req 5 - completionInfo	75ms (± 4.09%)	74ms (± 4.74%)	-1ms (- 0.90%)	69ms	77ms
xstateTSServer - node (v16.17.1, x64)
Req 1 - updateOpen	3,758ms (± 0.25%)	3,744ms (± 0.26%)	-13ms (- 0.36%)	3,727ms	3,753ms
Req 2 - geterr	1,445ms (± 2.23%)	1,433ms (± 1.40%)	-12ms (- 0.81%)	1,406ms	1,458ms
Req 3 - references	108ms (± 1.46%)	109ms (± 0.87%)	+1ms (+ 0.74%)	109ms	111ms
Req 4 - navto	350ms (± 0.71%)	348ms (± 1.37%)	-2ms (- 0.62%)	340ms	352ms
Req 5 - completionInfo count	3,154 (± 0.00%)	3,154 (± 0.00%)	0 ( 0.00%)	3,154	3,154
Req 5 - completionInfo	454ms (± 1.40%)	460ms (± 1.05%)	+5ms (+ 1.21%)	453ms	467ms
Compiler-UnionsTSServer - node (v14.15.1, x64)
Req 1 - updateOpen	3,060ms (± 0.87%)	3,040ms (± 0.72%)	-20ms (- 0.66%)	3,014ms	3,066ms
Req 2 - geterr	5,942ms (± 0.33%)	5,920ms (± 0.90%)	-22ms (- 0.37%)	5,844ms	5,973ms
Req 3 - references	391ms (± 0.25%)	388ms (± 0.80%)	-3ms (- 0.67%)	382ms	390ms
Req 4 - navto	289ms (± 0.81%)	288ms (± 0.74%)	-1ms (- 0.22%)	286ms	292ms
Req 5 - completionInfo count	1,356 (± 0.00%)	1,356 (± 0.00%)	0 ( 0.00%)	1,356	1,356
Req 5 - completionInfo	83ms (± 1.97%)	82ms (± 2.03%)	-1ms (- 1.19%)	79ms	83ms
CompilerTSServer - node (v14.15.1, x64)
Req 1 - updateOpen	3,205ms (± 0.78%)	3,193ms (± 0.63%)	-12ms (- 0.38%)	3,166ms	3,220ms
Req 2 - geterr	4,433ms (± 0.68%)	4,415ms (± 0.62%)	-19ms (- 0.42%)	4,366ms	4,440ms
Req 3 - references	408ms (± 1.23%)	404ms (± 0.57%)	-4ms (- 0.90%)	402ms	408ms
Req 4 - navto	313ms (± 0.80%)	304ms (± 2.70%)	-9ms (- 2.96%)	295ms	311ms
Req 5 - completionInfo count	1,518 (± 0.00%)	1,518 (± 0.00%)	0 ( 0.00%)	1,518	1,518
Req 5 - completionInfo	80ms (± 4.47%)	84ms (± 9.54%)	+5ms (+ 5.83%)	77ms	97ms
xstateTSServer - node (v14.15.1, x64)
Req 1 - updateOpen	3,800ms (± 0.55%)	3,789ms (± 0.84%)	-11ms (- 0.29%)	3,749ms	3,826ms
Req 2 - geterr	1,459ms (± 0.26%)	1,462ms (± 0.85%)	+3ms (+ 0.21%)	1,448ms	1,476ms
Req 3 - references	132ms (± 1.66%)	132ms (± 2.52%)	-1ms (- 0.50%)	128ms	136ms
Req 4 - navto	396ms (± 0.57%)	393ms (± 1.20%)	-3ms (- 0.83%)	384ms	397ms
Req 5 - completionInfo count	3,154 (± 0.00%)	3,154 (± 0.00%)	0 ( 0.00%)	3,154	3,154
Req 5 - completionInfo	490ms (± 3.00%)	490ms (± 1.22%)	+0ms (+ 0.08%)	482ms	498ms

System

Machine Name	ts-ci-ubuntu
Platform	linux 5.4.0-135-generic
Architecture	x64
Available Memory	16 GB
Available Memory	15 GB
CPUs	4 × Intel(R) Core(TM) i7-4770 CPU @ 3.40GHz

Hosts

• node (v18.10.0, x64)
• node (v16.17.1, x64)
• node (v14.15.1, x64)

Scenarios

• Compiler-UnionsTSServer - node (v18.10.0, x64)
• Compiler-UnionsTSServer - node (v16.17.1, x64)
• Compiler-UnionsTSServer - node (v14.15.1, x64)
• CompilerTSServer - node (v18.10.0, x64)
• CompilerTSServer - node (v16.17.1, x64)
• CompilerTSServer - node (v14.15.1, x64)
• xstateTSServer - node (v18.10.0, x64)
• xstateTSServer - node (v16.17.1, x64)
• xstateTSServer - node (v14.15.1, x64)

Benchmark	Name	Iterations
Current	51978	6
Baseline	main	6

Startup

Comparison Report - main..51978

Metric	main	51978	Delta	Best	Worst
tsc-startup - node (v16.17.1, x64)
Execution time	138.35ms (± 0.21%)	137.56ms (± 0.19%)	-0.79ms (- 0.57%)	136.69ms	139.74ms
tsserver-startup - node (v16.17.1, x64)
Execution time	222.49ms (± 0.27%)	221.34ms (± 0.19%)	-1.15ms (- 0.52%)	219.59ms	225.58ms
tsserverlibrary-startup - node (v16.17.1, x64)
Execution time	223.69ms (± 0.20%)	222.90ms (± 0.22%)	-0.80ms (- 0.36%)	221.21ms	231.06ms
typescript-startup - node (v16.17.1, x64)
Execution time	206.36ms (± 0.19%)	206.18ms (± 0.20%)	-0.19ms (- 0.09%)	204.24ms	209.13ms

System

Machine Name	ts-ci-ubuntu
Platform	linux 5.4.0-135-generic
Architecture	x64
Available Memory	16 GB
Available Memory	15 GB
CPUs	4 × Intel(R) Core(TM) i7-4770 CPU @ 3.40GHz

Hosts

• node (v16.17.1, x64)

Scenarios

• tsc-startup - node (v16.17.1, x64)
• tsserver-startup - node (v16.17.1, x64)
• tsserverlibrary-startup - node (v16.17.1, x64)
• typescript-startup - node (v16.17.1, x64)

Benchmark	Name	Iterations
Current	51978	6
Baseline	main	6

Developer Information:

Download Benchmark

[ahejlsberg]

Why does the example in #51970 require multiple inference contexts?

During inference for the this.get method call we check for ThisType annotations for outer object literals, and that requires access to the outer inference context for the call to Moon.

What broke it?

I explain that here.