Development at the Speed and Scale of Google

infoq.com

36 points·unreal37··7 comments

That is, half of the files in their perforce are "touched in the last 30 days".

I was there, live in this presentation, more than a year ago, at Hyderabad and got this clarification from the speaker.

very big difference to what the headline says, which was never going to be correct.

The title is a direct quote from the Google Engg. Tools blog post which was on HN recently - http://google-engtools.blogspot.com/2011/12/bug-prediction-a...

True. Half the code can be anything. Half the characters in source, half the lines (Which seem more plausible since version control systems deal with line as a unit) or half of the files or even half the binaries. I'm just clarifying based on my own clarification, which half it is.

I don't think, this is any surprising at all. I believe the statistics would remain the same, for many companies.

Much more informative that the title itself. Touching file and changing maybe one line is not a big deal, but rewriting half of the source code base every months is.

would they merge in head to their build before committing for code review?

Sorry misread the original post.

Before a code review you don't have to do a sync but its pretty common to sync frequently. I sync constantly as im developing because it's so easy. Occasionally i see reviews where i can tell that the person hasn't sync'd in a while and if i think it matters ill ask them to sync. This usually doesn't happen though

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