Andreas Kling 8f535435dc LibJS: Avoid property lookups during object initialization ...

When we're initializing objects, we're just adding a bunch of new
properties, without transition, and without overlap (we never add
the same property twice.)

Take advantage of this by skipping lookups entirely (no need to see
if we're overwriting an existing property) during initialization.

Another nice test-js speedup :^)

2020-10-13 23:57:45 +02:00

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