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Fidget-Spinner · Fidget-Spinner · commit 96ea93accc70 · 2025-12-31T00:49:35.000Z
diff --git a/Python/bytecodes.c b/Python/bytecodes.c
@@ -2992,6 +2992,7 @@ dummy_func(
                 ADVANCE_ADAPTIVE_COUNTER(this_instr[1].counter);
             }
             // For some reason, RESUME_CHECK_JIT is quite expensive compared to RESUME.
+            // It's enough to show up as a 10-20% slowdown in some benchmarks!
             // For that reason, we replace it back with RESUME immediately.
             // In JIT builds, we thus stick only to RESUME and wait for it to specialize to RESUME_CHECK_JIT.
             // This amkes RESUME slightly slower, but since the JIT is faster it makes up for it.

Original file line number	Diff line number	Diff line change
`@@ -2992,6 +2992,7 @@ dummy_func(`
`2992`	`2992`	`ADVANCE_ADAPTIVE_COUNTER(this_instr[1].counter);`
`2993`	`2993`	`}`
`2994`	`2994`	`// For some reason, RESUME_CHECK_JIT is quite expensive compared to RESUME.`
	`2995`	`+ // It's enough to show up as a 10-20% slowdown in some benchmarks!`
`2995`	`2996`	`// For that reason, we replace it back with RESUME immediately.`
`2996`	`2997`	`// In JIT builds, we thus stick only to RESUME and wait for it to specialize to RESUME_CHECK_JIT.`
`2997`	`2998`	`// This amkes RESUME slightly slower, but since the JIT is faster it makes up for it.`