[Experiment] fix(40617): handle uninitialized class member with computed key#45974
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weswigham merged 1 commit intomicrosoft:mainfrom Mar 5, 2022
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[Experiment] fix(40617): handle uninitialized class member with computed key#45974weswigham merged 1 commit intomicrosoft:mainfrom
weswigham merged 1 commit intomicrosoft:mainfrom
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Heya @andrewbranch, I've started to run the perf test suite on this PR at fed9253. You can monitor the build here. Update: The results are in! |
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Heya @andrewbranch, I've started to run the tarball bundle task on this PR at fed9253. You can monitor the build here. |
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Hey @andrewbranch, I've packed this into an installable tgz. You can install it for testing by referencing it in your and then running There is also a playground for this build and an npm module you can use via |
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@andrewbranch Here they are:Comparison Report - main..45974
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This was referenced Sep 28, 2021
TS does not automatically understand object with accessor type if not extracted to a variable
#46111
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@typescript-bot pack this |
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Heya @DanielRosenwasser, I've started to run the perf test suite on this PR at 5a5a04a. You can monitor the build here. Update: The results are in! |
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Heya @DanielRosenwasser, I've started to run the tarball bundle task on this PR at 5a5a04a. You can monitor the build here. |
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Hey @DanielRosenwasser, I've packed this into an installable tgz. You can install it for testing by referencing it in your and then running There is also a playground for this build and an npm module you can use via |
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@DanielRosenwasser Here they are:Comparison Report - main..45974
System
Hosts
Scenarios
Developer Information: |
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@weswigham @andrewbranch @DanielRosenwasser is this good to go into 4.7? Looks like we've got a recent performance run for it now. |
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This is something I wanted to figure out - whether the check time increases on the most recent change are within the margin of error. |
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Between zero and seven hundreths of a second (depending on the test, mapping to between zero and one point four percent) sounds like noise if not noise-adjacent numbers to me. |
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@typescript-bot perf test this |
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Heya @DanielRosenwasser, I've started to run the perf test suite on this PR at 5a5a04a. You can monitor the build here. Update: The results are in! |
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@DanielRosenwasser Here they are:Comparison Report - main..45974
System
Hosts
Scenarios
Developer Information: |
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Yeah, this second run makes it look more like noise. We see check time decrease on some and then increase on the same repo with a different Node version. |
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From the design meeting:
|
Contributor
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Weighing in as one user: supporting symbol-named properties in CFA (without temporary variables) seems very nice and is definitely what I would expect. For me, it's easily worth this tiny performance penalty, though I probably like/use symbol named properties more than many. |
Contributor
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(happy to move this to a new issue) If I read the release blog post correctly, the following test case should work, but it still produces an error. interface Foo {
[key: string]: number | string;
}
declare function generateKey(): string;
function fn(foo: Foo) {
const key = generateKey();
if (typeof foo[key] === 'number') {
foo[key].toExponential(2);
// Error: Property 'toExponential' does not exist on type 'string | number'.
}
}Is this a bug? TS Playground Link v4.7.0-dev.20220420 |
Member
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I'd definitely file that as a separate issue, otherwise we're not going to be able to track or discuss it. |
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Fixes #40617
Fixes #45965
Fixes #36230
Fixes #29042
Fixes #46111
Fixes #14137