Testing CPU speed

 

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This is useful for choosing what version of Quicktime movies to use. For example, the Sorenson codec produces much nicer quality than the CiniPak codec, but is highly CPU intensive, requiring at least a fast Pentium or PowerPC 603/604. [See more information on Quicktime Codecs from Terran Interactive.]

on useSorenson   -- Should I use Sorenson or Cinipak movies?   global gSorenson -- whether to use Sorenson video   if QuickTimeVersion() >= 3 then -- if sorenson codec loaded     if SieveTest() < 25 then -- choose your own threshold       set gSorenson to TRUE     else       set gSorenson to FALSE -- QT 3 enabled, but processor too slow     end if   else     set gSorenson to FALSE   end if end -- Sieve Benchmark Test -- Summary of typical results in Dir 6 (shorter times are better) ... -- MAC PowerMac 604e/180 --> 13 ticks -- MAC PowerMac G3/266 to G3/300 ---> 5 to 7 ticks -- PC Pentium 100 ---> 35 ticks -- PC Pentium 200 to 233 ---> 14 to 20 ticks -- PC Pentium II 266 to 350 ---> 5 to 6 ticks on SieveTest     set SIZE = 8190     set FLAGS = []   repeat with n = 1 to SIZE     add(FLAGS,TRUE)   end repeat     set COUNT = 0     set Start = 0   startTimer     repeat with N = 1 to SIZE         if getAt(FLAGS,N) then             set PRIME = ((2 * N) + 3)       set K = (N + PRIME)             repeat while (K <= SIZE)         setAt(FLAGS,K,FALSE)         set K = (K + PRIME)       end repeat             set COUNT = (COUNT + 1)           end if       end repeat     set Stop = the Timer     Return (Stop - Start)   end SieveTest