💸 Raise image minimumCacheTTL so optimised images stay cached - #4918
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💸 Raise image minimumCacheTTL so optimised images stay cached#4918isaaclombardssw wants to merge 1 commit into
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next.config.mjs set images.minimumCacheTTL to 60s, so every /_next/image response was near-uncacheable and re-optimised constantly. Raise it to a year (31536000). Image URLs are keyed on source path + width + quality, so a content change in Tina produces a new upload path and a new URL — a long TTL is safe. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01Q8genJyZboXaa4vgYhJF4P
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Closes #4902
next.config.mjssetimages.minimumCacheTTL: 60, so every/_next/imageresponse carried a 60-second cache lifetime — repeat visitors and multi-page sessions re-downloaded (and the server re-optimised) every image. This is Lighthouse's "Use efficient cache lifetimes" finding.Raised it to a year (
31536000), the usual choice. Optimised image URLs are keyed on source path + width + quality, so changing an image in Tina produces a new upload path and therefore a new URL — the long TTL is safe and doesn't require a manual purge.One-line change; the rest of the
imagesblock is untouched to avoid conflicts with the other open PRs on this file.Note: the acceptance criteria also ask to confirm the CDN/host in front of the app isn't overriding the
Cache-Controlheader and to re-run Lighthouse — those verifications need a deploy and should be checked on the preview/staging slot.🤖 Generated with Claude Code
https://claude.ai/code/session_01Q8genJyZboXaa4vgYhJF4P