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Frontend Asset Optimization #7

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Frontend Asset Optimization #7

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16 changes: 13 additions & 3 deletions pkg/api/webassets/webassets.go
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Original file line number Diff line number Diff line change
Expand Up @@ -8,6 +8,7 @@ import (
"net/http"
"os"
"path/filepath"
"sync"

"github.com/grafana/grafana/pkg/api/dtos"
"github.com/grafana/grafana/pkg/services/licensing"
Expand All @@ -31,12 +32,21 @@ type EntryPointInfo struct {
} `json:"assets,omitempty"`
}

var entryPointAssetsCache *dtos.EntryPointAssets = nil
var (
entryPointAssetsCacheMu sync.RWMutex // guard entryPointAssetsCache
entryPointAssetsCache *dtos.EntryPointAssets // TODO: get rid of global state
)

func GetWebAssets(ctx context.Context, cfg *setting.Cfg, license licensing.Licensing) (*dtos.EntryPointAssets, error) {
if cfg.Env != setting.Dev && entryPointAssetsCache != nil {
return entryPointAssetsCache, nil
entryPointAssetsCacheMu.RLock()
ret := entryPointAssetsCache
entryPointAssetsCacheMu.RUnlock()

if cfg.Env != setting.Dev && ret != nil {
return ret, nil
}
entryPointAssetsCacheMu.Lock()
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@codoki-pr-intelligence codoki-pr-intelligence bot Sep 9, 2025

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🔷 Medium: Add a second check after acquiring the write lock to avoid redundant manifest loading under concurrent calls; the current flow can perform the entire I/O twice (first goroutine computes, second acquires the lock afterward and computes again).

suggestion
if cfg.Env != setting.Dev && entryPointAssetsCache != nil {
entryPointAssetsCacheMu.Unlock()
return entryPointAssetsCache, nil
}
defer entryPointAssetsCacheMu.Unlock()

defer entryPointAssetsCacheMu.Unlock()

var err error
var result *dtos.EntryPointAssets
Expand Down