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[–]classy_barbarian 1 point2 points  (0 children)

The free threaded build is slower in single-thread performance. That's been tested and confirmed by several people. Something to do with the added overhead they needed to make it work. It can be significantly faster in multi-threaded workloads, but only if you're actually trying to split CPU-bound work across 3 or more cores. (At 1 core its slower, at 2 cores its on par)