5 Replies to “Sudden buildkernel improvements”

1. Is the “j”-option necessary for building? For example on a 4core: make -j 4 buildkernel ?

   Because this is recommended on: https://www.dragonflybsd.org/docs/newhandbook/Upgrading/

   Or is a simple “make” sufficient to use all cores?

2. make itself will run one make job at a time unless you tell it to run more. If there’s only one job running, it can only run on one core.

3. Quick, someone bore Matt more!

4. The “j” option is necessary for building if:
   1) you have more than 1 core
   2) you want to use more than 1 core

   Like Justin said, if you omit it, it will use only one core no matter how many you have.

5. You pretty much always want to use -j, I would think. There’s not a lot of single-core x86 computers left.

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