Update benchmark numbers in examples

This commit updates the benchmark numbers in various example files. The
changes reflect recent performance optimizations or adjustments to the
benchmarking environment.

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: 488.0us
+
+;; Benchmark: 471.7us
 ;; Benchmark-Repeat: 6
 
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