How do I catch a regression after release?

Compare the new build against the previous version and watch for new failures, with alerts to catch it fast. The clearest signal that a release regressed is its crash rate (or failure set) being worse than the previous version, so tracking crashes per version and comparing the new build against the last isolates exactly that question, did this update make something worse, while an aggregate that blends versions would hide it. Also watch for new crash signatures appearing after the release, a failure mode that didn't exist on previous builds and shows up on the new one is almost certainly a regression the update introduced, catching a class of regression that volume comparison alone might miss. Pair both with alerting so the regression reaches you within minutes of release, as the new build's numbers diverge from the old (a crash-rate spike or new high-impact signature pages you), rather than depending on you to notice. This combination, per-version comparison, new-signature detection, and post-release alerting, catches regressions fast after release, while they've affected few players and can still be rolled back or hotfixed, which is what keeps a shipped regression from quietly degrading your game until complaints pile up. The key is monitoring per version (not in aggregate, which hides regressions) right after each release (when regressions appear) with alerts (so detection is automatic and fast), so that any regression that slipped through your pre-release testing is caught quickly in the field, by showing the new build performing worse than the one it replaced or introducing a new failure mode. Capturing crashes from the field with version tags and signatures is what makes this post-release regression detection possible.

How do new crash signatures help detect regressions?

They catch a whole class of regression that crash-rate comparison alone might miss: the ones that introduce an entirely new failure mode rather than worsening an existing crash. A regression doesn't always show up as more of an existing crash, sometimes an update breaks something in a new way, producing a crash signature your previous builds never had, and if you only watch overall crash rate, a modest new crash might not move the rate enough to stand out, especially amid normal variation. Watching for new signatures appearing after a release flags these directly: since a crash signature that didn't exist on any previous build and shows up on the new one almost certainly originates from the update (the new build introduced it), a new signature is a strong, specific regression indicator. This complements crash-rate comparison (which catches regressions that increase overall crash volume) by catching the regressions that introduce new, distinct failures, together they cover both 'more of an existing crash' and 'a brand-new crash,' which are the two ways a regression manifests. Grouping crashes by signature and tracking them per version makes a new signature on a new build stand out, since you can see that this particular crash type first appeared on this release and wasn't present before, which both detects the regression and tells you which release introduced it (a useful diagnostic). So watching for new crash signatures is a valuable regression-detection practice because it surfaces the newly-introduced failure modes that pure crash-rate monitoring can miss, ensuring you catch regressions whether they worsen existing crashes or create new ones. Combined with comparing crash rates across versions (for the volume-increasing regressions) and post-release alerting (to catch both fast), watching for new signatures rounds out your regression detection so that the various ways a regression can show up, more crashes or new crashes, are all caught quickly after release.

Best Practices for Detecting Regressions

Q: What are the best practices for detecting regressions?

Compare each new version against the last (the clearest detection method, since a build with a higher crash rate or new failures than the previous one has regressed, and the comparison makes it obvious, while without per-version comparison regressions hide in overall noise). Watch for new crash signatures that didn't exist before the update (since a regression often introduces a new failure mode, and a crash that didn't exist before and does after is almost certainly a regression the update caused, which crash-rate comparison alone might miss). Monitor closely right after each release with alerts (since regressions appear as players adopt the new build, so a regression is caught in minutes), and run regression checks before shipping (to catch them earlier). Detecting regressions fast keeps updates from quietly degrading your game, so the practices serve version-over-version comparison (the core detection), new-signature watching (for new failure modes), post-release monitoring with alerts (to catch them fast), and pre-release regression testing (to catch them before shipping), which together cover regressions on both sides of release, catching them before they ship (testing) and right after (per-version monitoring and new-signature detection), so a regression is caught while it's affected few players rather than degrading your game until complaints pile up.

Quick answer: Compare each new version against the last, watch for new crash signatures, monitor right after each release with alerts, and run regression checks before shipping. Fast detection keeps updates from degrading your game.

A regression, something that worked breaking in an update, degrades your game silently if you don't catch it. Here are the best practices for detecting regressions.

Compare Each New Version Against the Last

The clearest way to detect a regression is comparison, so compare each new version against the previous one. A new build with a higher crash rate or new failures has regressed, and the comparison makes it obvious, while without per-version comparison, regressions hide in the overall noise.

Bugnet tracks crash rate per version, so comparing each release against the last is direct. Version-over-version comparison is the single most effective regression-detection technique, since it isolates exactly what changed, did this update make something worse.

Watch for New Crash Signatures That Didn't Exist Before

A regression often shows up as a new crash signature, a failure mode your previous builds never had, so watch for new signatures appearing after a release. A crash that didn't exist before the update and does after is almost certainly a regression the update introduced.

Bugnet groups crashes by signature and tracks per version, so a new signature on a new build stands out. Watching for new crash signatures catches regressions that introduce new failures, complementing crash-rate comparison.

Monitor Right After Release With Alerts and Test Before Shipping

Regressions appear right after a release, so monitor closely then with alerts (so a regression is caught in minutes), and run regression checks before shipping (to catch them earlier). The combination covers regressions both before they ship and right after.

Bugnet alerts on crash spikes and tracks per version, catching post-release regressions fast. So practice detecting regressions by comparing versions, watching for new signatures, and monitoring after release with alerts plus testing before shipping, catching regressions on both sides of release before they degrade your game.

Compare each new version against the last, watch for new crash signatures, monitor right after each release with alerts, and run regression checks before shipping. Fast detection keeps updates from degrading your game.