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Bug 1774796 - Add largest-first delazification strategy. r=arai

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This patch adds a new off-thread delazification strategy, which adds a bit of
overhead to queue function with a priority order, which put the largest function
as the first functions to be delazified.

The intent of this new strategy is to limit the usage of main-thread
delazification to the smallest function, in case where the main-thread would win
the delazification race.

Differential Revision: https://phabricator.services.mozilla.com/D149651
This commit is contained in:
Nicolas B. Pierron
2022-06-20 13:33:49 +00:00
parent eb2142d6cf
commit 050fe026f7
6 changed files with 147 additions and 12 deletions
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4
dom/script/ScriptLoader.cpp
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@@ -1701,6 +1701,10 @@ nsresult ScriptLoader::AttemptAsyncScriptCompile(ScriptLoadRequest* aRequest,
TRACE_FOR_TEST(aRequest->GetScriptLoadContext()->GetScriptElement(),
"delazification_concurrent_depth_first");
break;
case JS::DelazificationOption::ConcurrentLargeFirst:
TRACE_FOR_TEST(aRequest->GetScriptLoadContext()->GetScriptElement(),
"delazification_concurrent_large_first");
break;
case JS::DelazificationOption::ParseEverythingEagerly:
TRACE_FOR_TEST(aRequest->GetScriptLoadContext()->GetScriptElement(),
"delazification_parse_everything_eagerly");