Extraction of Uniques is in some places done inefficiently
In some places in the GHC sources, extraction of a Unique
from a UniqSupply
is done in the following manner:
case splitUniqSupply us of
(us1,us2) -> (uniqFromSupply us1, us2)
This way of splitting a UniqSupply
into a Unique
and a new UniqueSupply
is needlessly inefficient since it forces and then throws away an extra Unique
.
takeUniqFromSupply
should be used instead.
Trac metadata
Trac field | Value |
---|---|
Version | 7.6.3 |
Type | Bug |
TypeOfFailure | OtherFailure |
Priority | normal |
Resolution | Unresolved |
Component | Compiler |
Test case | |
Differential revisions | |
BlockedBy | |
Related | |
Blocking | |
CC | |
Operating system | |
Architecture |