https://issues.dlang.org/show_bug.cgi?id=13061
Issue ID: 13061
Summary: [GC] investigate using compressed bitmaps for
attribute bits
Product: D
Version: D2
Hardware: All
OS: All
Status: NEW
Severity: enhancement
Priority: P1
Component: druntime
Assignee: [email protected]
Reporter: [email protected]
We're currently using a considerable amount of space storing bitmaps.
I suspect the bit patterns within them are good candidates for compression.
The attributes which aren't aren't used during marking inner loop are good
candidates for compression as they are less performance sensitive.
There's even room for improvement with the eagerly allocated "scan" bit set
which are only used for deferred scanning of blocks when a deep heap graph is
encountered.
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