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  • #9075

Closed
Open
Opened May 04, 2014 by Edward Z. Yang@ezyangDeveloper

Per-thread weak pointer list (remove global lock on mkWeak#)

Currently, we have to take out the storage manager lock when a weak pointer is allocated. If you're making a lot of weak pointers, this could become a bottleneck. We should maintain a per-thread weak pointer list per generation, so that we don't have to take out a lock.

Marking priority as low since I don't think anyone actually is trying to allocate tons of weak pointers on multiple threads, but I think this optimization should be relatively cheap. Probably a good starter ticket.

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Version 7.9
Type Bug
TypeOfFailure OtherFailure
Priority low
Resolution Unresolved
Component Runtime System
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CC simonmar
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Architecture
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Reference: ghc/ghc#9075