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  1. To: CRUNCHers                                  Date:09/05/86
  2.  
  3. From: Paul Foote
  4.  
  5. Subject: CRUNCH20 Benchmarking
  6.  
  7. I think the two items below will be of interest to anyone
  8. involved with data compression.
  9.  
  10.  
  11. -------------------------------------------------------------
  12.  
  13. Msg#: 237    Date: 09/05/86 
  14. From: SYSOP (Gary Inman, West Los Angeles RCP/M)
  15.   To: ALL
  16.   Re: CRUNCH20
  17.            
  18.      
  19.        TEST FILES          CRUNCH12            CRUNCH20
  20. ---------------------------------------------------------
  21. MEXPAT22.ASM   8k   MEXPAT22.AZM   6k   MEXPAT22.AZM   4k
  22. MXH-CC1 .ASM  18k   MXH-CC1 .AZM  12k   MXH-CC1 .AZM  10k
  23. NCCSBIOS.ASM  32k   NCCSBIOS.AZM  18k   NCCSBIOS.AZM  16k
  24. NEW06   .ASM  20k   NEW06   .AZM  12k   NEW06   .AZM  10k
  25. NKMD102 .ASM 160k   NKMD102 .AZM 108k   NKMD102 .AZM  76k
  26. SYSMAP3 .ASM   4k   SYSMAP3 .AZM   2k   SYSMAP3 .AZM   2k
  27. TELL    .ASM   6k   TELL    .AZM   4k   TELL    .AZM   4k
  28. ZCMD28  .ASM  80k   ZCMD28  .AZM  48k   ZCMD28  .AZM  40k
  29. ZCMD29  .ASM  78k   ZCMD29  .AZM  46k   ZCMD29  .AZM  38k
  30.              ====                ====                ====
  31.              406k                256k                200k
  32. sysop note:
  33. I think these figures speak for themselves.  This was done
  34. the system's hard drive which uses 2k blocks.
  35.  
  36.                     
  37. ------------------------------------------------------------
  38.           
  39.  
  40. Now here are my (PF) results on a typical dBASE II file:
  41.  
  42.  
  43.                          Number of                Compression
  44.                        CP/M  Records             Time (min:sec)
  45.  
  46. Original                  5472                     ---
  47.  
  48. Huffman
  49. SQUEEZEd                  1470                    8:22
  50.  
  51. Greenberg
  52. CRUNCHed (1.2)            1054                    6:16
  53.  
  54. Greenberg
  55. CRUNCHed (2.0)             951                    6:05 
  56.  
  57.  
  58. This test was done on my Xerox 820-II with dual 8" floppy drives.
  59.  
  60. ------------------------------------------------------------------