Branch: refs/heads/main
Home: https://github.com/WebKit/WebKit
Commit: 50140920094471b706bb200855128b5d25b6976a
https://github.com/WebKit/WebKit/commit/50140920094471b706bb200855128b5d25b6976a
Author: Ben Schwartz <[email protected]>
Date: 2024-12-11 (Wed, 11 Dec 2024)
Changed paths:
M Tools/Scripts/webkitpy/xcode/simulated_device.py
M Tools/Scripts/webkitpy/xcode/simulated_device_unittest.py
Log Message:
-----------
[webkitpy] SimulatedDeviceManager.initialize_devices should rebuild the dyld
shared cache before booting simulators with none already booted.
https://bugs.webkit.org/show_bug.cgi?id=284494
rdar://141316056
Reviewed by Jonathan Bedard.
If booted before the dyld shared cache has a chance to populate, simulator
processes under SimulatorTrampoline appear to load all of the relevant
frameworks into memory for each process. This is causing severe simulator
performance regressions, which slows down testing and eats into host device
swap memory (especially when using multiple simulators in parallel).
Anecdotal API test stats (running 1 simulator):
- No dyld shared cache: 3:00:51
- With dyld shared cache: 1:44:57
For this reason, if no simulators are booted, we should rebuild the dyld shared
cache before booting new ones.
* Tools/Scripts/webkitpy/xcode/simulated_device.py:
-> (SimulatedDeviceManager.Runtime.__init__): Add new properties.
-> (SimulatedDeviceManager.Runtime.rebuild_dyld_shared_cache): Add new
function that rebuilds the shared cache for the runtime.
-> (SimulatedDeviceManager.initialize_devices): Call
rebuild_dyld_shared_cache if no simulators are booted.
* Tools/Scripts/webkitpy/xcode/simulated_device_unittest.py: Adjusting unit
test mock input from simctl json.
Canonical link: https://commits.webkit.org/287716@main
To unsubscribe from these emails, change your notification settings at
https://github.com/WebKit/WebKit/settings/notifications
_______________________________________________
webkit-changes mailing list
[email protected]
https://lists.webkit.org/mailman/listinfo/webkit-changes
