On 2018-10-25 10:46 p.m., Rene Rivera via Boost-build wrote:

While adding the "--debug" option for building I added LTO to the release build. And that gives an overall 11% perf improvement (with xcode 10 clang).

That's quite impressive. I'd be curious to see a heat map showing where the time is spent. I was expecting most of the time being spent in running subprocesses (the actual commands), rather than within b2 itself. So an overall performance improvement of 11% based on work on b2 itself suggests that assumption is wrong.

Thanks,

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