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Performance improvement for last commit cache and show-ref (#15455) (#15701)

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Backport #15455

* Improve performance when there are multiple commits in the last commit cache

* read refs directly if we can

Signed-off-by: Andrew Thornton <art27@cantab.net>
This commit is contained in:
zeripath
2021-05-03 15:51:41 +01:00
committed by GitHub
parent 3ce46a7fbd
commit 4fa2804238
3 changed files with 30 additions and 5 deletions
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9
modules/git/last_commit_cache_nogogit.go
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@@ -7,6 +7,8 @@
package git
import (
"bufio"
"io"
"path"
)
@@ -34,7 +36,7 @@ func NewLastCommitCache(repoPath string, gitRepo *Repository, ttl func() int64,
}
// Get get the last commit information by commit id and entry path
func (c *LastCommitCache) Get(ref, entryPath string) (interface{}, error) {
func (c *LastCommitCache) Get(ref, entryPath string, wr *io.PipeWriter, rd *bufio.Reader) (interface{}, error) {
v := c.cache.Get(c.getCacheKey(c.repoPath, ref, entryPath))
if vs, ok := v.(string); ok {
log("LastCommitCache hit level 1: [%s:%s:%s]", ref, entryPath, vs)
@@ -46,7 +48,10 @@ func (c *LastCommitCache) Get(ref, entryPath string) (interface{}, error) {
if err != nil {
return nil, err
}
commit, err := c.repo.getCommit(id)
if _, err := wr.Write([]byte(vs + "\n")); err != nil {
return nil, err
}
commit, err := c.repo.getCommitFromBatchReader(rd, id)
if err != nil {
return nil, err
}