On Thu, May 15, 2014 at 11:39:26AM +0100, Ramana Radhakrishnan wrote:
> What's the overhead with bootstrap-ubsan ?

I timed normal bootstrap and bootstrap-ubsan on x86_64, 24 cores,
Intel(R) Xeon(R) CPU X5670  @ 2.93GHz (aka cfarm 20) and the results:

--enable-languages=all

real    35m10.419s
user    204m5.613s
sys     6m15.615s

--enable-languages=all --with-build-config=bootstrap-ubsan

real    71m39.338s
user    347m53.409s
sys     7m44.281s

        Marek

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