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The renderers share decoded images within a budget that was 1 GiB on every desktop OS: the installed memory was read only on Linux, and there the budget was an eighth of it, at most 1 GiB. Images whose decoded pixels add up to more than that were decoded again each time the view moved from one image to another: 0.9 to 1.1 s for a 12000 x 9000 JPEG and 2.0 to 2.2 s for a 16384 x 16384 one on a Ryzen 7 9800X3D. The default budget is now a quarter of the installed memory, with no fixed ceiling: GlobalMemoryStatusEx on Windows (through winsafe, which vectorcraft-cli already uses), sysctl hw.memsize on macOS, hw.physmem on FreeBSD and /proc/meminfo on Linux. It stays 1 GiB where the memory can't be read and 256 MiB in the web build, and a 32-bit build keeps at most a quarter of its address space. Docs: docs/target-app-parity.md.