Hier mal ein Auszug aus der Logdatei, maßgeblich die Auswertungen der Image Filter

image_norewrites_high_resolution: 0
image_ongoing_rewrites: 0
image_rewrite_latency_total_ms: 7189
image_rewrite_total_bytes_saved: 636819
image_rewrite_total_original_bytes: 793620
image_rewrite_uses: 106
image_rewrites: 20
image_rewrites_dropped_decode_failure: 0
image_rewrites_dropped_due_to_load: 0
image_rewrites_dropped_intentionally: 98
image_rewrites_dropped_mime_type_unknown: 2
image_rewrites_dropped_nosaving_noresize: 0
image_rewrites_dropped_nosaving_resize: 0
image_rewrites_dropped_server_write_fail: 0

Erklärungen im Detail:

Wichtige Einstellungen:

ModPagespeedCriticalImagesBeaconEnabled true