Re: encode-universal-time slow

[bill@cambridge.apple.com (Bill St. Clair)]

>Random discovery for the day ----  I've got code that manages many,
>many temporal intervals.  I  was trying to optimize part of it and I
>just discovered that MCL2.0Bp3's encode-universal-time takes 40 times
>as much execution time (measured on my IIfx) if you don't supply the
>optional timezone argument.... 

I, too, have an FX. It takes longer for me, but not 40 times as long:

? (time (dotimes (i 1000)
          (encode-universal-time 0 10 12 22 6 92 5)))
(DOTIMES (I 1000) (ENCODE-UNIVERSAL-TIME 0 10 12 22 6 92 5)) took 65 ticks (1.083 seconds) to run.
Of that, 10 ticks (0.167 seconds) were spent in The Cooperative Multitasking Experience.
 49240 bytes of memory allocated.
NIL
? (time (dotimes (i 1000)
          (encode-universal-time 0 10 12 22 6 92)))
(DOTIMES (I 1000) (ENCODE-UNIVERSAL-TIME 0 10 12 22 6 92)) took 97 ticks (1.617 seconds) to run.
Of that, 11 ticks (0.183 seconds) were spent in The Cooperative Multitasking Experience.
 96496 bytes of memory allocated.
NIL
?