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[README] Add hint, how to use automatically the optimal number of CPU cores

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Heiko Thiel 2022-03-07 12:07:11 +01:00
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README.md
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@ -102,8 +102,9 @@ This is an example work-flow and configuration to get and build the LLVM source:
* Running a serial build will be **slow**. To improve speed, try running a
parallel build. That's done by default in Ninja; for ``make``, use the option
``-j NNN``, where ``NNN`` is the number of parallel jobs, e.g. the number of
CPUs you have.
``-j NNN``, where ``NNN`` is the number of parallel jobs to run.
In most cases, you get the best performance if you specify the number of CPU threads you have.
On some Unix systems, you can specify this with ``-j$(nproc)``.
* For more information see [CMake](https://llvm.org/docs/CMake.html)