Andreas Kling 80d6330a26 LibWeb: Don't create mutation record node lists if nobody is interested ...

By deferring allocation of StaticNodeList objects until we know somebody
actually wants the MutationRecord, we avoid a *lot* of allocation work.

This shaves several seconds off of loading https://tc39.es/ecma262/

At least one other engine (WebKit) skips creating mutation records if
nobody is interested, so even if this is observable somehow, we would
at least match the behavior of a major engine.

2023-05-23 06:31:37 +02:00

6.3 KiB

Raw Blame History

View Raw