[performance] add optional S3 object info caching (#4546)

This adds an optional S3 object info cache to the S3 storage driver backend (see [here](https://codeberg.org/gruf/go-storage/releases/tag/v0.4.0)) to reduce S3 calls largely during media cleanup operations, but it should also help in other situations cutting back on S3 calls when for example a key is already known to not exist.

Reviewed-on: https://codeberg.org/superseriousbusiness/gotosocial/pulls/4546
Co-authored-by: kim <grufwub@gmail.com>
Co-committed-by: kim <grufwub@gmail.com>

1 files changed, 44 insertions, 0 deletions

diff --git a/vendor/codeberg.org/gruf/go-storage/s3/cache/cache.go b/vendor/codeberg.org/gruf/go-storage/s3/cache/cache.go
new file mode 100644
index 000000000..ce8aeb63b
--- /dev/null
+++ b/vendor/codeberg.org/gruf/go-storage/s3/cache/cache.go
@@ -0,0 +1,44 @@
+package cache
+
+import (
+	"time"
+
+	"codeberg.org/gruf/go-cache/v3/simple"
+	"codeberg.org/gruf/go-cache/v3/ttl"
+	"codeberg.org/gruf/go-storage/s3"
+)
+
+// check interface conformity.
+var _ s3.EntryCache = &EntryCache{}
+var _ s3.EntryCache = &EntryTTLCache{}
+
+// EntryCache provides a basic implementation
+// of an s3.EntryCache{}. Under the hood it is
+// a mutex locked ordered map with max capacity.
+type EntryCache struct {
+	simple.Cache[string, *s3.CachedObjectInfo]
+}
+
+func New(len, cap int) *EntryCache {
+	var cache EntryCache
+	cache.Init(len, cap)
+	return &cache
+}
+
+func (c *EntryCache) Put(key string, info *s3.CachedObjectInfo) {
+	c.Cache.Set(key, info)
+}
+
+type EntryTTLCache struct {
+	ttl.Cache[string, *s3.CachedObjectInfo]
+}
+
+func NewTTL(len, cap int, ttl time.Duration) *EntryTTLCache {
+	var cache EntryTTLCache
+	cache.Init(len, cap, ttl)
+	return &cache
+}
+
+func (c *EntryTTLCache) Put(key string, info *s3.CachedObjectInfo) {
+	c.Cache.Set(key, info)
+}