Because the cost of type checks dominate our dart2wasm benchmarks, we've
decided to pass `--omit-type-checks` for now.

This was previously reverted because the skwasm benchmarks were broken
in general for a separate reason, and my getting rid of `bringup: true`
broke the tree. I ended up fixing the benchmarks and getting rid of
`bringup: true` in a separate commit, so this just adds the flag only.

Reverts flutter/flutter#131102 as it closed the tree due to `Linux web_benchmarks_skwasm` failures. The test seems to be timing out without completing.

Example failure: https://ci.chromium.org/ui/p/flutter/builders/prod/Linux%20web_benchmarks_skwasm/1/overview

We've decided to use the `--omit-type-checks` flag for our dart2wasm benchmarks. Right now, many of the benchmark results are dominated by type checks and most of what we are actually trying to measure get drowned out in the noise.

Added to be able to view logs from https://github.com/flutter/engine/pull/43616.

Added to debug https://github.com/flutter/flutter/issues/129836

Adding debugging for https://github.com/flutter/flutter/issues/129836.

Takes a screenshot when startup test takes too long (10 minutes).

Also, removes some old debugging and add new debugging message.

This enables benchmarks for the Skwasm renderer, compiled with
dart2wasm.

Platform views aren't supported in Skwasm yet, so we are skipping those
benchmarks for now.

For tracking perf improvements with changes like
https://github.com/flutter/engine/pull/43152.

Workaround solution for: https://github.com/flutter/flutter/issues/121231
See https://github.com/flutter/flutter/issues/120808#issuecomment-1551826299 Error Case 2 for more information.

Sometimes the `ios-deploy` process does not return the logs from the application. We've been unable to figure out why. This is a solution to workaround that by using `idevicesyslog` alongside `ios-deploy` as a backup in getting the log for the Dart VM url. As explained in https://github.com/flutter/flutter/issues/120808#issuecomment-1551826299, when error case 2 happens, the `idevicesyslog` does successfully find the Dart VM.

Also, in the comments of the code it mentions `syslog` is not written on iOS 13+, this was added in response to this issue: https://github.com/flutter/flutter/issues/41133.

However, `idevicesyslog` does in fact work (at least for iOS 16), we use it to collect device logs for our CI tests already: https://github.com/flutter/flutter/blob/1dc26f80f04c1c1091a83c5fead9b3aa83483292/dev/devicelab/lib/framework/devices.dart#L998-L1006

By default, the browser fuzzes the timer APIs such that they have a granularity of approximately 100 microseconds (this is due to Spectre mitigation techniques). However, many of the thing we are trying to measure actually have a much finer granularity than 100 microseconds. As a result, many of our benchmarks are extremely noisy and don't provide accurate data.

By serving the initial script files with the `Cross-Origin-Opener-Policy: same-origin` and `Cross-Origin-Embedder-Policy: require-corp` HTTP headers, the browser runs the benchmarks in a `crossOriginIsolated` context, which restores the fine granularity of APIs such as `performance.now()` to microsecond precision.

Also, we were considering anything an outlier that was more than one standard deviation away from the mean. In a normal distribution, that means we are only capturing 68% of the data and the rest are considered outliers. This is not ideal. Doing two standard deviations away captures 95% of the data, and the outliers are in the remaining 5%, which seems much more reasonable.

The newly updated lint will soon flag for-each in collections.

See discussion: https://github.com/dart-lang/linter/pull/4383

/cc @goderbauer

I think the flake is due to setclipboard or semantics update race condition. I migrated the test to use integration test package which relies less on timing

fixes https://github.com/flutter/flutter/issues/124636

Add a benchmark that measures the improvements from https://github.com/flutter/engine/pull/41803

Part of https://github.com/flutter/flutter/issues/103542

Fixes https://github.com/flutter/flutter/issues/126020.

Not sure why this wasn't already being reported.

Fixes https://github.com/flutter/flutter/issues/125648

This adds a performance test for `Slider` and `RangeSlider` to run on Android.
This is to measure upcoming changes to these widgets and compare their performance. 

https://user-images.githubusercontent.com/48603081/233633349-0bcad3c3-04a9-42dd-acd0-46b76ce51178.mp4

Force plugin transitive dependencies to an ARC compatible version

Make logs verbose for gallery tests

This allows us to check for performance differences in local Web SDKs.

## Pre-launch Checklist

- [x] I read the [Contributor Guide] and followed the process outlined
there for submitting PRs.
- [x] I read the [Tree Hygiene] wiki page, which explains my
responsibilities.
- [x] I read and followed the [Flutter Style Guide], including [Features
we expect every widget to implement].
- [x] I signed the [CLA].
- [x] I listed at least one issue that this PR fixes in the description
above.
- [x] I updated/added relevant documentation (doc comments with `///`).
- [x] I added new tests to check the change I am making, or this PR is
[test-exempt].
- [x] All existing and new tests are passing.

If you need help, consider asking for advice on the #hackers-new channel
on [Discord].

<!-- Links -->
[Contributor Guide]:
https://github.com/flutter/flutter/wiki/Tree-hygiene#overview
[Tree Hygiene]: https://github.com/flutter/flutter/wiki/Tree-hygiene
[test-exempt]:
https://github.com/flutter/flutter/wiki/Tree-hygiene#tests
[Flutter Style Guide]:
https://github.com/flutter/flutter/wiki/Style-guide-for-Flutter-repo
[Features we expect every widget to implement]:
https://github.com/flutter/flutter/wiki/Style-guide-for-Flutter-repo#features-we-expect-every-widget-to-implement
[CLA]: https://cla.developers.google.com/
[flutter/tests]: https://github.com/flutter/tests
[breaking change policy]:
https://github.com/flutter/flutter/wiki/Tree-hygiene#handling-breaking-changes
[Discord]: https://github.com/flutter/flutter/wiki/Chat

[devicelab] add regular old blur benchmark

Remove 1745 decorative breaks

Adding timestamps to task runner output lines.

delete sksl benchmarks

Set plugin template minimum iOS version to 11.0

[Tool] [Windows] Output app path on build completion

Revert "[Tool] [Windows] Output app path on build completion"

[Tool] [Windows] Output app path on build completion

[gallery] roll gallery to 6a8d738c94d0710e229d726729c09fdb5ccaf7ed

Take screenshot on devicelab failure

Revert "[Impeller] Temporary flag flip for devicelab tests to use Impeller redux. (#122340)" (#122362)

Revert "[Impeller] Temporary flag flip for devicelab tests to use Impeller redux."

Enable plugin_test_linux

This reverts commit 21b8b729.

[Impeller] Temporary flag flip for devicelab tests to use Impeller.

Funnel devicelab tests through utils process methods

This reverts commit 275ab9c6.

Revert "Reland "Remove references to Observatory (#118577)""

This reverts commit 298d8c76.