Timeit timeit

Measures execution time of an expression.

;; Measure simple calculation
↪ (timeit (+ 1 2))
0.015

;; Measure function execution
↪ (timeit (map {x: (* x 2)} [1 2 3 4 5]))
0.245

;; Measure with error handling
↪ (timeit (try (/ 1 0) {e: "Division by zero"}))
0.032

;; Multiple expressions
↪ (timeit (do 
            (set x 10)
            (+ x 20)
            (* x 2)))
0.128

Syntax

(timeit expr)

- expr: Expression to measure - Returns execution time in milliseconds

Warning

• Time includes parsing and evaluation
• Results may vary between runs
• Precision depends on system timer resolution
• Special form - does not evaluate argument first