Store dirs "Cache" and "Code Cache" in $XDG_RUNTIME_DIR/.cache/Min

[eleksir]

Min uses $XDG_CONFIG_HOME/Min for this purpose, but most chrome-like browsers use $XDG_RUNTIME_DIR/.cache/application_name to avoid unnecessary disk thrashing.

$XDG_RUNTIME_DIR in many linux distributions points somwhere to /run/user/$(id -u) and in most distributions /run mounted as tmpfs.

[eleksir]

There is also set of same dirs in $XDG_CONFIG_HOME/Min/Partitions/webcontent/Cache $XDG_CONFIG_HOME/Min/Partitions/webcontent/Code Cache

I don't quite understand what for? But it looks like they also should be in $XDG_RUNTIME_DIR/.cache/Min

[PalmerAL]

See https://github.com/electron/electron/issues/8124 and the proposed fix: https://github.com/electron/electron/pull/19693

I think the current summary of the situation is here: https://github.com/electron/electron/pull/19693#pullrequestreview-584007491

I think this was originally a Chromium design decision that we inherited, so I'm not sure what other Chromium browsers are doing differently here. Using the standard cache directory does seem like a better choice, but I don't think we can do anything here until Electron decides what to do.

[loserMcloser]

Do NOT use $XDG_RUNTIME_DIR since that may not be on persistent storage. (On my Archlinux machine, $XDG_RUNTIME_DIR points to /run/user/${UID} and /run is mounted as tmpfs.)

Should be $XDG_CACHE_HOME/Min

[PalmerAL]

It looks like the solution Electron eventually decided on is this: https://github.com/electron/electron/pull/33554/files

Unfortunately, we store browsing history using IndexedDB, which I think would be part of sessionData. We don't want that to go in the cache directory, so I don't think there's any good way to use the splitting offered by Electron.

What we're currently doing therefore seems like the best available option to me.