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Is there a way to use parallelism when building the wheels? #1088

@Strilanc

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@Strilanc

Waiting for cibuildwheel to finish is really painful, even for a single wheel. Is there a flag I can use in order to force it to use multiple threads when building? For example, when building code with make I can specify --jobs 8 to build 8 source files at a time instead of 1 at a time.

For scale, cibuildwheel is one hundred (!!!!!) times slower than all the other checks I do. Being able to reduce that to 10x slower by using parallelism would be hugely helpful.

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