221384 2021-02-03 23:08:32 -0800 REGRESSION(r267763) Network process launches earlier than before 2021-03-03 23:37:52 -0800 1 1 1 Unclassified WebKit WebKit API WebKit Nightly Build Unspecified Unspecified RESOLVED FIXED https://bugs.webkit.org/show_bug.cgi?id=222713 InRadar P2 Normal --- 1 achristensen webkit-unassigned cdumez webkit-bug-importer oldest_to_newest 1725511 0 achristensen 2021-02-03 23:08:32 -0800 This is a performance regression in the launch time of apps that use WebKit. 1725518 1 419242 achristensen 2021-02-03 23:22:02 -0800 Created attachment 419242 patch 1725627 2 419242 cdumez 2021-02-04 08:30:23 -0800 Comment on attachment 419242 patch View in context: https://bugs.webkit.org/attachment.cgi?id=419242&action=review r=me with a comment. > Source/WebKit/UIProcess/WebsiteData/Cocoa/WebsiteDataStoreCocoa.mm:590 > + if (!m_networkProcess) I am not convinced about this particular part of the change. This gets called when the WebProcess finishes launching. I believe we usually have a network process by this point but if we don't, I am not convinced returning early is the right thing to do here. It means we wouldn't send the XPCEndpoint to the process. What makes sure we send the XPC endpoint to the process when the network process actually launches? I cannot find such logic. Note that there may be a pre-existing bug here when the network process relaunches due to a crash. I am not quite sure what is XPCEndpoint is used for, so maybe it's not a big deal. 1725661 3 achristensen 2021-02-04 09:33:48 -0800 You're right. That's called after WebProcessPool::prewarmProcess which is the point after the app has "launched", which is beyond the point at which we care whether we have delayed the network process launch, and it's also beyond the point at which we can delay the launch any more because we have a web process that is requesting a connection. I'll omit that part. 1725683 4 achristensen 2021-02-04 10:10:56 -0800 http://trac.webkit.org/r272376 1725684 5 webkit-bug-importer 2021-02-04 10:11:14 -0800 <rdar://problem/73986584> 419242 2021-02-03 23:22:02 -0800 2021-02-04 08:30:23 -0800 patch patch text/plain 9478 achristensen ZGlmZiAtLWdpdCBhL1NvdXJjZS9XZWJLaXQvQ2hhbmdlTG9nIGIvU291cmNlL1dlYktpdC9DaGFu Z2VMb2cKaW5kZXggZTc3NjhhZWU0ZmIyLi5mMGRjOThmNDMyNGEgMTAwNjQ0Ci0tLSBhL1NvdXJj ZS9XZWJLaXQvQ2hhbmdlTG9nCisrKyBiL1NvdXJjZS9XZWJLaXQvQ2hhbmdlTG9nCkBAIC0xLDMg KzEsMzkgQEAKKzIwMjEtMDItMDMgIEFsZXggQ2hyaXN0ZW5zZW4gIDxhY2hyaXN0ZW5zZW5AYXBw bGUuY29tPgorCisgICAgICAgIFJFR1JFU1NJT04ocjI2Nzc2MykgTmV0d29yayBwcm9jZXNzIGxh dW5jaGVzIGVhcmxpZXIgdGhhbiBiZWZvcmUKKyAgICAgICAgaHR0cHM6Ly9idWdzLndlYmtpdC5v cmcvc2hvd19idWcuY2dpP2lkPTIyMTM4NAorICAgICAgICA8cmRhcjovL3Byb2JsZW0vNzM1MDc3 MDY+CisKKyAgICAgICAgUmV2aWV3ZWQgYnkgTk9CT0RZIChPT1BTISkuCisKKyAgICAgICAgQmVm b3JlIHIyNjc3NjMgd2UgY291bGQgaGF2ZSBhbiBhcHAgbGF1bmNoLCBhbGxvY2F0ZSBhIFdLV2Vi 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