REBOL [ Title: "Time a Block" Date: 28-Oct-1998 File: %timeblk.r Author: "Brian Casiello" Purpose: "Times the execution of a REBOL block." Comment: { Prints the elapsed time to execute the passed-in block. The /reps refinement specifies the number of times to execute the block. } library: [ level: 'intermediate platform: none type: 'tool domain: none tested-under: none support: none license: none see-also: none ] ] time-block: func [block /reps times] [ if not reps [times: 1] start: now/time loop times [do :block] print now/time - start ] example: [ fib: func [x] [ if (x < 2)[return x] return (fib x - 2) + (fib x - 1) ] time-block [fib 20] time-block/reps [fib 20] 5 ] ;do example ; remove comment to run example