From: Linus Torvalds Date: Wed, 20 Apr 2005 23:07:11 GMT Subject: Re: on when to checksum Message-ID: In-Reply-To: <200504202252.PAA16837@emf.net> On Wed, 20 Apr 2005, Tom Lord wrote: > > How many times per day do you invoke `write-tree' and why? Every single commit does a write-tree, so when I merge with Andrew, it's usually a series of 100-250 of them in a row. (Actually, _usualyl_ it's smaller series, but it's the big series that can be painful enough to matter). > It takes a large multiple of `0.3s' to get me to take you seriously > on this point. The thing is, I don't "trickle" things in. That would be horribly inefficient for me. So I go over the patches, make a mbox, and do them all in one go. And then they need to happen _fast_. If it takes 20 minutes, I go away for coffee or something, and then if something didn't apply half-way through, I will have lost my "context". That's why I want things instant. Not because I have huge daily throughput issues, but I have huge _latency_ issues. I considered doing a "two-level" thing, where I first did the stuff in a light-weigth patch manager, and then batched things up in the background for the real thing. But the fact is, I don't think it's needed. Not the way git performs now. If I can apply a hundred patches in a minute or two, I have not "lost the context" if it turns out that there is some silly glitch with one of them. Linus