| commit | cdfff4d25a01ee1ae269d31a57c1e65ea00249b0 | [log] [tgz] |
|---|---|---|
| author | Cherry Zhang <cherryyz@google.com> | Wed Apr 29 22:00:28 2020 -0400 |
| committer | Cherry Zhang <cherryyz@google.com> | Thu Apr 30 21:30:02 2020 +0000 |
| tree | b910a310c82a075b7e17104d8a2f770391ee5560 | |
| parent | ca290169ab219a414dbae8124f442559c907ea4d [diff] |
[dev.link] cmd/link: use more compact representation for external relocations Currently, for external relocations, the ExtReloc structure contains all the fields of the relocation. In fact, many of the fields are the same with the original relocation. So, instead, we can just use an index to reference the original relocation and not expand the fields. There is one place where we modify relocation type: changing R_DWARFSECTREF to R_ADDR. Get away with it by changing downstreams. It also makes it easier to retrieve the reloc variant. This reduces some allocation. Linking cmd/compile with external linking, name old alloc/op new alloc/op delta Reloc_GC 34.1MB ± 0% 22.7MB ± 0% -33.30% (p=0.000 n=5+4) Change-Id: Id08a89ed2aee705296886d3b95014b806a0d55cf Reviewed-on: https://go-review.googlesource.com/c/go/+/231217 Run-TryBot: Cherry Zhang <cherryyz@google.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Than McIntosh <thanm@google.com> Reviewed-by: Jeremy Faller <jeremy@golang.org>
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