forgejo/modules/git/last_commit_cache.go
Gusted a1cd6f4e3a
[GITEA] Drop sha256-simd in favor of stdlib
- In Go 1.21 the crypto/sha256 [got a massive
improvement](https://go.dev/doc/go1.21#crypto/sha256) by utilizing the
SHA instructions for AMD64 CPUs, which sha256-simd already was doing.
The performance is now on par and I think it's preferable to use the
standard library rather than a package when possible.

```
cpu: AMD Ryzen 5 3600X 6-Core Processor
                │  simd.txt   │               go.txt                │
                │   sec/op    │    sec/op     vs base               │
Hash/8Bytes-12    63.25n ± 1%    73.38n ± 1%  +16.02% (p=0.002 n=6)
Hash/64Bytes-12   98.73n ± 1%   105.30n ± 1%   +6.65% (p=0.002 n=6)
Hash/1K-12        567.2n ± 1%    572.8n ± 1%   +0.99% (p=0.002 n=6)
Hash/8K-12        4.062µ ± 1%    4.062µ ± 1%        ~ (p=0.396 n=6)
Hash/1M-12        512.1µ ± 0%    510.6µ ± 1%        ~ (p=0.485 n=6)
Hash/5M-12        2.556m ± 1%    2.564m ± 0%        ~ (p=0.093 n=6)
Hash/10M-12       5.112m ± 0%    5.127m ± 0%        ~ (p=0.093 n=6)
geomean           13.82µ         14.27µ        +3.28%

                │   simd.txt   │               go.txt                │
                │     B/s      │     B/s       vs base               │
Hash/8Bytes-12    120.6Mi ± 1%   104.0Mi ± 1%  -13.81% (p=0.002 n=6)
Hash/64Bytes-12   618.2Mi ± 1%   579.8Mi ± 1%   -6.22% (p=0.002 n=6)
Hash/1K-12        1.682Gi ± 1%   1.665Gi ± 1%   -0.98% (p=0.002 n=6)
Hash/8K-12        1.878Gi ± 1%   1.878Gi ± 1%        ~ (p=0.310 n=6)
Hash/1M-12        1.907Gi ± 0%   1.913Gi ± 1%        ~ (p=0.485 n=6)
Hash/5M-12        1.911Gi ± 1%   1.904Gi ± 0%        ~ (p=0.093 n=6)
Hash/10M-12       1.910Gi ± 0%   1.905Gi ± 0%        ~ (p=0.093 n=6)
geomean           1.066Gi        1.032Gi        -3.18%
```

(cherry picked from commit abd94ff5b5)
(cherry picked from commit 15e81637ab)

Conflicts:
	go.mod
	https://codeberg.org/forgejo/forgejo/pulls/1581
(cherry picked from commit 325d92917f)

Conflicts:
	modules/context/context_cookie.go
	https://codeberg.org/forgejo/forgejo/pulls/1617
(cherry picked from commit 358819e895)
(cherry picked from commit 362fd7aae1)
(cherry picked from commit 4f64ee294e)
(cherry picked from commit 4bde77f7b1)
(cherry picked from commit 1311e30a81)
(cherry picked from commit 57b69e334c)
(cherry picked from commit 52dc892fad)
(cherry picked from commit 77f54f4187)
(cherry picked from commit 0d0392f3a5)

Conflicts:
	go.mod
	https://codeberg.org/forgejo/forgejo/pulls/2034
(cherry picked from commit 92798364e8)
(cherry picked from commit 43d2181277)
(cherry picked from commit 45c88b86a3)
2024-01-15 16:11:57 +00:00

114 lines
3.1 KiB
Go

// Copyright 2020 The Gitea Authors. All rights reserved.
// SPDX-License-Identifier: MIT
package git
import (
"crypto/sha256"
"fmt"
"code.gitea.io/gitea/modules/log"
"code.gitea.io/gitea/modules/setting"
)
// Cache represents a caching interface
type Cache interface {
// Put puts value into cache with key and expire time.
Put(key string, val any, timeout int64) error
// Get gets cached value by given key.
Get(key string) any
}
func getCacheKey(repoPath, commitID, entryPath string) string {
hashBytes := sha256.Sum256([]byte(fmt.Sprintf("%s:%s:%s", repoPath, commitID, entryPath)))
return fmt.Sprintf("last_commit:%x", hashBytes)
}
// LastCommitCache represents a cache to store last commit
type LastCommitCache struct {
repoPath string
ttl func() int64
repo *Repository
commitCache map[string]*Commit
cache Cache
}
// NewLastCommitCache creates a new last commit cache for repo
func NewLastCommitCache(count int64, repoPath string, gitRepo *Repository, cache Cache) *LastCommitCache {
if cache == nil {
return nil
}
if count < setting.CacheService.LastCommit.CommitsCount {
return nil
}
return &LastCommitCache{
repoPath: repoPath,
repo: gitRepo,
ttl: setting.LastCommitCacheTTLSeconds,
cache: cache,
}
}
// Put put the last commit id with commit and entry path
func (c *LastCommitCache) Put(ref, entryPath, commitID string) error {
if c == nil || c.cache == nil {
return nil
}
log.Debug("LastCommitCache save: [%s:%s:%s]", ref, entryPath, commitID)
return c.cache.Put(getCacheKey(c.repoPath, ref, entryPath), commitID, c.ttl())
}
// Get gets the last commit information by commit id and entry path
func (c *LastCommitCache) Get(ref, entryPath string) (*Commit, error) {
if c == nil || c.cache == nil {
return nil, nil
}
commitID, ok := c.cache.Get(getCacheKey(c.repoPath, ref, entryPath)).(string)
if !ok || commitID == "" {
return nil, nil
}
log.Debug("LastCommitCache hit level 1: [%s:%s:%s]", ref, entryPath, commitID)
if c.commitCache != nil {
if commit, ok := c.commitCache[commitID]; ok {
log.Debug("LastCommitCache hit level 2: [%s:%s:%s]", ref, entryPath, commitID)
return commit, nil
}
}
commit, err := c.repo.GetCommit(commitID)
if err != nil {
return nil, err
}
if c.commitCache == nil {
c.commitCache = make(map[string]*Commit)
}
c.commitCache[commitID] = commit
return commit, nil
}
// GetCommitByPath gets the last commit for the entry in the provided commit
func (c *LastCommitCache) GetCommitByPath(commitID, entryPath string) (*Commit, error) {
sha, err := NewIDFromString(commitID)
if err != nil {
return nil, err
}
lastCommit, err := c.Get(sha.String(), entryPath)
if err != nil || lastCommit != nil {
return lastCommit, err
}
lastCommit, err = c.repo.getCommitByPathWithID(sha, entryPath)
if err != nil {
return nil, err
}
if err := c.Put(commitID, entryPath, lastCommit.ID.String()); err != nil {
log.Error("Unable to cache %s as the last commit for %q in %s %s. Error %v", lastCommit.ID.String(), entryPath, commitID, c.repoPath, err)
}
return lastCommit, nil
}