Andreas Kling 910de95e7a LibJS: Add a fast failure path to try_parse_arrow_function_expression() ...

The save/load of parser state performed by lookahead parsing is quite
expensive so let's try to avoid it in the most common case.

This is a 15-20% speedup on various chunks of JS I've tested. :^)

2021-09-14 02:51:16 +02:00

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