Add global parsed index cache (#132)

This dedupes parsing the index (and the index itself) so we aren't parsing the same index over and over again (and holding a bunch of copies in memory). Again, not the best, but this is the second of three things we're going to dedupe in-process like this, mostly for the terraform provider, which does a lot of simultaneous work that is very very similar and amenable to this kind of deduplication. Signed-off-by: Jon Johnson <[email protected]>
chainguard-dev · Oct 10, 2023 · 5e3480e · 5e3480e
1 parent 49b8212
commit 5e3480e
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diff --git a/pkg/apk/cache.go b/pkg/apk/cache.go
@@ -30,7 +30,7 @@ import (
 // This is terrible but simpler than plumbing around a cache for now.
 // We will assume that for a given process, we want to reuse etag values.
 // Doing this cuts down on the number of requests we send for index and keys.
-var globalCache = &etagCache{}
+var globalEtagCache = &etagCache{}
 
 type etagResp struct {
 	resp      *http.Response
@@ -225,7 +225,7 @@ func (t *cacheTransport) RoundTrip(request *http.Request) (*http.Response, error
 		}, nil
 	}
 
-	return globalCache.get(t, request, cacheFile)
+	return globalEtagCache.get(t, request, cacheFile)
 }
 
 func cacheDirFromFile(cacheFile string) string {