Update benchmark metadata

This commit updates the benchmark metadata in several example files. The
benchmark runs and repeat counts have been slightly adjusted due to
optimizations or minor variations in execution.

examples/tak.myc

@@ -2,8 +2,8 @@
 ;; heavily recursive, benefits significantly from specialization of integer arithmetic
 ;; and direct function calls (skipping dynamic dispatch).
 ;; Output: 5
-
-;; Benchmark: 471.9us
+
+;; Benchmark: 488.0us
 ;; Benchmark-Repeat: 5
 
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