Hi Alex, Thank you. The (profile) tool is exactly what was needed here
In the scaling loops, it made more of a difference than I thought to copy object properties into local variables. However, the idx tree change you pointed out is what helped most. : (prog (setq Msg (make (do (** 2 16) (link (rand (char "A") (char "Z")))))) (length Msg)) -> 65536 : (bench (/ (length (ACDC_Compress Msg)) 8)) 2.761 sec -> 38785 : (bench (= Msg (ACDC_Decompress (ACDC_Compress Msg)))) 5.478 sec -> T Initially those numbers were larger by a factor of 5 I am sure there is lot more I will find to optimize as a I explore a bit more. /Lindsay # 1Mb list : (prog (setq Msg (make (do (** 2 20) (link (rand (char "A") (char "Z")))))) (length Msg)) -> 1048576 : (bench (= Msg (ACDC_Decompress (ACDC_Compress Msg)))) 73.807 sec -> T : (mapc prof ...-> NIL : (bench (/ (length (ACDC_Compress Msg)) 8)) 36.574 sec -> 616497 : (profile) (2492 217 computeLower> . +ACDC_BasicModel) (602 48 emit> . +ACDC_BasicModel) (137 10 ACDC_Compress) (129 8 update> . +ACDC_BasicModel) (0 0 emitEof> . +ACDC_BasicModel) -> (0 0 emitEof> . +ACDC_BasicModel)
