GC is very slow in the presence of weak hashtables
Bug #1241771 reported by Ilya Perminov on 2013-10-18
This bug affects 1 person
Weak hashtables severely affect GC performance.
In my test, GC time goes from 100ms to 20s, after creating a
reasonably large hashtable.
Tested using SBCL 1.1.12, Linux x86_64.
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