[cfe-dev] Hardware for building LLVM+Clang in 10-20 minutes

Anton Yartsev anton.yartsev at gmail.com
Fri Mar 29 08:43:12 PDT 2013

On 29.03.2013 19:16, John Criswell wrote:
> On 3/29/13 9:48 AM, Anton Yartsev wrote:
>> Hi all!
>> I have finally decided to upgrade from my old Core 2 Duo E8500, 6GB 
>> DDR2 400 MHz.
>> Currently the full building+testing of llvm lasts for hours (slightly 
>> faster with VS2008, slightly slower with MinGW) and makes everything 
>> lag.
> By "test," do you mean the lit tests in llvm/test or a full run of the 
> test suite in the test-suite project?
I mean lit tests.

>> Ideally would be happy to perform build+test for about 10-20 minutes, 
>> as some fast builders do, and have no lags with other useful 
>> applications, such as browsers and Acrobat, during building/testing.
>> Please can anybody advise me an appropriate hardware? Or just tell, 
>> what hardware the fast buildbots are running (specifically 
>> clang-native-mingw64-win7, clang-x86_64-ubuntu-gdb-75 and 
>> clang-x86_64-debian-fast)?
> Just to throw out some rough numbers, we have a 128 GB, 32 core 
> machine.  The processors are Intel(R) Xeon(R) CPU E7- 8837  @ 2.67GHz.
> Doing a make -j20 on LLVM+Clang from scratch takes about 4 minutes of 
> wall time and about 50 minutes of user+system CPU time.  I can't seem 
> to run the tests in llvm/test, so I can't time that.
Cool! :)
Then I can forget about 10 minutes..
looking at something like Intel Core i7-3770K or Core i7-3930K in the 
best case.

Thanx for your replay!

> -- John T.


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