Commit 23f1b5ff authored by Paul Sokolovsky's avatar Paul Sokolovsky Committed by Damien George
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py: Add note about -fno-crossjumping when compiling vm.c.

parent 96e22154
......@@ -162,3 +162,11 @@ $(PY_BUILD)/gc.o: CFLAGS += $(CSUPEROPT)
# optimising vm for speed, adds only a small amount to code size but makes a huge difference to speed (20% faster)
# Optimizing vm.o for modern deeply pipelined CPUs with branch predictors
# may require disabling tail jump optimization. This will make sure that
# each opcode has its own dispatching jump which will improve branch
# branch predictor efficiency.
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