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[dap] Don't use --start-paused when running in Profile/Release mode#98926

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[dap] Don't use --start-paused when running in Profile/Release mode#98926
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DanTup:no-debug-for-release-profile

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@DanTup DanTup commented Feb 22, 2022

This change mirrors a fix made in the legacy VS Code extension DAP for Dart-Code/Dart-Code#3838.

The issue is that we were using --start-paused in profile mode which would cause a short delay when new isolates were spawned (because they would start paused and wait for us to unpause them). For some measurements of time (including a simple stopwatch) this could make code that uses isolates appear to be slower than it really is.

There was no need to use --start-paused for profile mode since debugging functionality is disabled (so we are not concerned about races in setting up breakpoints, etc.) so this simple skips it in those cases.

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@flutter-dashboard flutter-dashboard bot added the tool Affects the "flutter" command-line tool. See also t: labels. label Feb 22, 2022
christopherfujino
christopherfujino reviewed Feb 22, 2022
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packages/flutter_tools/lib/src/debug_adapters/flutter_adapter.dart Outdated
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nit. this sentence is awkward. should it be "This is always true for attach requests."?

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Oops! Awkward is an understatement 😄 Fixed!

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DanTup commented Feb 23, 2022

@christopherfujino there doesn't seem to be much info about the failure here:

https://ci.chromium.org/ui/p/flutter/builders/try/Mac%20framework_tests_misc/13487/overview

@christopherfujino christopherfujino mentioned this pull request Feb 24, 2022
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christopherfujino commented Feb 24, 2022

https://ci.chromium.org/ui/p/flutter/builders/try/Mac%20framework_tests_misc/13487/overview

I'm guessing this was an infra failure, the swarming task page just says "bot died" https://chromium-swarm.appspot.com/task?id=593f4101f7b6cb10&o=true&w=true

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LGTM. the analysis error will be fixed by rebasing upstream.

@fluttergithubbot fluttergithubbot merged commit 76758ef into flutter:master Feb 25, 2022
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76758ef [dap] Don't use --start-paused when running in Profile/Releas…
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…e mode (flutter/flutter#98926)
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76758ef [dap] Don't use --start-paused when running in Profile/Releas…
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76758ef [dap] Don't use --start-paused when running in Profile/Releas…
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76758ef [dap] Don't use --start-paused when running in Profile/Releas…
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[dap] Don't use --start-paused when running in Profile/Release mode (f…
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