Hi, Ian Eure <[email protected]> writes:
> I’ve been frustrated by this before, but decided to measure things: > > `guix home list-generations' takes 3.535s to list 28 items. > `guix system list-generations' takes 1.406s to list 35 items. > `guix pull --list-generations' takes 232.599s to list 41 items. > > Why is `guix pull --list-generations' >100x slower than `guix system > list-generations'? Because for each pair of generations, it shows the corresponding news entries (as per ‘guix pull --news’), and that part is quite expensive because it involves a Git log traversal. I think we should (1) optimize the news code (that’s ‘channel-news-for-commit’), and (2) if that’s not enough consider keeping it off by default in ‘guix pull --list-generations’. Thoughts? Ludo’.
