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Google Is 2B Lines of Code, All in One Place

wired.com

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Re: Google Is 2B Lines of Code, All in One Place

#121

Post by BooneJS »

ocdtrekkie wrote: post #112
DannyBee wrote: post #80

Earlier quoted context omitted.

Note that this is just the monolithic repository. Google also has other non-piper repositories containing hundreds of millions of lines too :P For example, android and chrome are git based. Note also that when codesearch used to crawl and index the world's code, it was not actually that large. It used to download and index tarballs, svn and cvs repositories, etc. All told, the amount of code in the world that it coul…

I'm still trying to figure out why having everything dumped in one big pile is something worth bragging about. I'd far rather have code sorted well into proper repositories.

So much is shared, though, right? Which is why Android is sorted into proper repositories but still has the 'repo' front-end wrapper to make sure you're getting the right versions of everything you need.

If I wanted to change something fundamental, like I found a 10% speedup in Protobuf wire decode by changing the message slightly, there are likely very many services that all need it.

Everyone at Google operates on HEAD. You're not allowed to break HEAD, and pre-submit/post-submit bots ensure you don't and will block your submit.

Re: Google Is 2B Lines of Code, All in One Place

#122

Post by ksk »

branchless wrote: post #103
ksk wrote: post #97

Its interesting that they compare LoC with Windows. I suppose that this article wants us to be amazed at those numbers. However, my experience with Google's products indicates a gradual decline in performance and a simultaneous gradual increase in memory bloat (Maps, Gmail, Chrome, Android). Which ironically, FWIW, hasn't been the case with Windows. I have noticed zero difference in performance going from Windows 7 t…

I'd have to disagree with this. First the baseline: windows is very slow. Second I found later versions slower. Third (and most maddening) every version of windows I've ever used has gotten slower over time (including not installing new s/w and defragmenting).

I know that people have had experiences similar to yours. It's fine to disagree, but AFAIK pretty much all benchmarks show that there is no noticeable difference in performance from 7 to 8 to 10 and this matches with my own experience. I refuse to upgrade unless I get similar or better performance. But then again, I'm not really interested in researching every single benchmark. Windows is fast, stays fast, and that's pretty much all I care about.

Re: Google Is 2B Lines of Code, All in One Place

#124

Post by fishtoaster »

[deleted] wrote: post #120
antics wrote: post #119

Earlier quoted context omitted.

I can't say. I work here, but I don't speak for the company.

[deleted]

That figure is common knowledge, not new information that antics is sharing with us. https://en.wikipedia.org/wiki/Source_lines_of_code#Example

Re: Google Is 2B Lines of Code, All in One Place

#128

Post by ohitsdom »

antics wrote: post #109

Just because people are talking about it: I work at MSFT, and the numbers Wired quotes for the lines of code in Windows are not even close to being correct. Not even in the same order of magnitude. Their source claims that Windows XP has ~45 million lines of code. But that was 14 years ago. The last time Windows was even in the same order of magnitude as 50 million LOC was in the Windows Vista timeframe. EDIT: And, r…

> single-digit _multiple_ of the entire Netflix movie catalog

Strange unit of comparison, although I may start using it.

Re: Google Is 2B Lines of Code, All in One Place

#129

Post by Touche »

tuckerman wrote: post #105
Touche wrote: post #98

Earlier quoted context omitted.

This discourages you from ever making breaking changes to an API. On the face of it that sounds good but sometimes you do have to make breaking changes. My guess is that there are many duplicate projects in the Google code base for when a breaking change is needed. This is a way to sidestep the problem.

I think sometimes it's actually the opposite. I was able to make a breaking change to an API and update all of the callers to use the new one in a single commit. Tests would run on all the clients and, since in my workspace the server was updated simultaneously, I could be more sure it would work.

That's fine for small breaking changes like an API being renamed, but some times breaking changes require actually refactoring code which is hard/impossible to do without intimate knowledge of a codebase.

Think python 2->3 or Angular 1->2. These types of changes do happen, and I bet they happen at Google. I don't think anyone is rewriting a downstream app when they make these changes. Most likely they are doing something like forking the library and renaming it, which is just another form of versioning.

Re: Google Is 2B Lines of Code, All in One Place

#130

Post by rakoo »

antics wrote: post #109

Just because people are talking about it: I work at MSFT, and the numbers Wired quotes for the lines of code in Windows are not even close to being correct. Not even in the same order of magnitude. Their source claims that Windows XP has ~45 million lines of code. But that was 14 years ago. The last time Windows was even in the same order of magnitude as 50 million LOC was in the Windows Vista timeframe. EDIT: And, r…

> the numbers Wired quotes for the lines of code in Windows are not even close to being correct

OTOH you can't blame them for being incorrect if you (as in, Microsoft, not you personally) are being so secretive about the figures. I'm pretty sure everyone would love to see how Microsoft works internally, especially now that you teased us with that Windows build system.

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