PageObjectSnapshotCacheMissCount property

Counts page-object snapshot reads that had to capture the page objects again

The counter increments once for every PageObjectsSnapshot access whose page slot is not valid, which happens on first access, after the entry was evicted by capacity pressure, after the page was edited and after a document reload resized the slot array

A miss triggers a fresh capture with TPdfPageObjectSnapshotOptions.Default budgets. The result is stored only when the capacity is positive and the capture completed; otherwise the capture repeats on the next access

The value is cumulative for the lifetime of the TPdf instance and never resets

Reading is guarded by the render lock used by native PDFium page access

Lookups are never rejected: with retention disabled every access is a miss that still returns a freshly captured snapshot

Pair the value with PageObjectSnapshotCacheHitCount to compute the effective miss ratio

PageObjectSnapshotCacheHitCount, PageObjectSnapshotCacheCount, PageObjectSnapshotCacheCapacity, PageObjectsSnapshot