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Maurice
49e68fb07c
Everything that changes with a release currently drags the entry chunk with it, and 63 of 141 chunks import the entry statically. Measured with a one-token edit to a leaf route module and a rebuild, 70 of 141 chunks rehash — just over 1 MB gzip that every installed PWA re-downloads per deploy, since the service worker registers with autoUpdate. Pulling react and the core libraries out cuts that to 847 kB: rehashed 70/141 -> 60/140 gzip 1,038,497 B -> 847,688 B (-18.4%) entry 580,672 B -> 258,105 B eager JS 1,482,722 B -> 1,482,523 B (unchanged) eager CSS same file, same hash No first paint win, then — the gain is a smaller update delta and a halved entry to parse on weak devices. Three of the five groups the plan called for are left out, and not silently: mapbox-gl/maplibre-gl, leaflet and react-markdown already sit in async chunks whose hashes survive a release, so a group would only rename them. Worse, without tags: ['$initial'] a group also collects modules that hang behind React.lazy today and turns its chunk into a static import of the entry — measured, that put the 2.8 MB GL chunk into the index.html modulepreload and took eager JS to 4.61 MB, undoing the route split for maps. Note for the next person to touch this: vite 8 bundles with rolldown, so rollupOptions is only an alias and both manualChunks and advancedChunks are deprecated in favour of codeSplitting.groups. A config using the old names builds green and has no effect. Also refreshes two comments that still quoted pre-split bundle numbers.