1652a2c316
This CL introduces a new mSpanList type to replace the empty mspan variables that were previously used as list heads. To be type safe, the previous circular linked list data structure is now a tail queue instead. One complication of this is mSpanList_Remove needs to know the list a span is being removed from, but this appears to be computable in all circumstances. As a temporary sanity check, mSpanList_Insert and mSpanList_InsertBack record the list that an mspan has been inserted into so that mSpanList_Remove can verify that the correct list was specified. Whereas mspan is 112 bytes on amd64, mSpanList is only 16 bytes. This shrinks the size of mheap from 50216 bytes to 12584 bytes. Change-Id: I8146364753dbc3b4ab120afbb9c7b8740653c216 Reviewed-on: https://go-review.googlesource.com/15906 Run-TryBot: Matthew Dempsky <mdempsky@google.com> Reviewed-by: Austin Clements <austin@google.com> |
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