[Python-Dev] Variant of removing GIL.

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    Martin> However, this is really hard to do correctly - if it were
    Martin> simple, it would have been done long ago.

I don't believe difficulty is the only (or primary) barrier.  I think
*someone* would have tackled it since Greg Stein did back in 1.4(?) or his
free-threading changes would have been incorporated into the core had they
yielded speedups on multiprocessors and not hurt performance on
uniprocessors.

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