---
title: "bfcache"
description: "1 posts about bfcache, summarised, each linking to the original."
---

# bfcache
> 1 posts about bfcache, summarised, each linking to the original.

## Articles

### [Measuring the back/forward cache with Application Metrics](https://yomu.fyi/post/measuring-the-back-forward-cache-with-application-metrics.md)
- Company: [Sentry](https://yomu.fyi/company/sentry.md)
- Author: Abdelrahman Awad
- Published: Sep 24, 2026
- Type: Announcement

The back/forward cache (bfcache) allows instant page restores by freezing snapshots, yet its hits register no events in traditional telemetry, creating a blind spot for teams. Sentry’s bfcacheMetricsIntegration fills this gap by modeling three browser-provided signals as application metrics: a navigation counter with hit/miss outcome, a per-reason counter for misses via the notRestoredReasons API, and a distribution of fallback reload duration. The integration is opt-in and launched in JavaScript SDKs v11; detailed miss reasons are currently Chromium-only due to browser API support. Users can query these metrics to break down bfcache health by route, release, or browser, enabling discovery of regressions caused by unload listeners, cache-control headers, or third-party scripts. This turns the bfcache from an invisible performance feature into a measurable, trackable signal that teams can monitor and improve.