perf(downloader): fetch metadata concurrently with stream download

2026-03-01 21:29:02 +01:00
parent 0a8da3d0e7
commit cd45c3f40a
1 changed files with 8 additions and 2 deletions
@@ -167,8 +167,11 @@ func (c *Client) downloadSong(ctx context.Context, resource deezer.Resource, son
 	}

 	metadataFetcher := newMetadataFetcher(c.deezerClient.Session.HttpClient)
+	metadataChan := make(chan metadataResult, 1)
+	go func() {
 		metadataResult := metadataFetcher.fetch(ctx, song, opts)
-	warnings = append(warnings, metadataResult.warnings...)
+		metadataChan <- metadataResult
+	}()

 	stream, err := c.deezerClient.GetMediaStream(ctx, media, song.ID)
 	if err != nil {
@@ -196,6 +199,9 @@ func (c *Client) downloadSong(ctx context.Context, resource deezer.Resource, son
 		warnings = append(warnings, fmt.Sprintf("failed to fetch cover image: %v", err))
 	}

+	metadataResult := <-metadataChan
+	warnings = append(warnings, metadataResult.warnings...)
+
 	finalizeWarnings := c.finalizeDownload(resource, song, outputPath, mediaFormat, metadataResult.genre, cover, metadataResult.bpmKey)
 	warnings = append(warnings, finalizeWarnings...)