Dear Folks: Thanks for the Judy Tree data structure! It has been an excellent tool to use in some computational linguistics research where we need to fiddle with large datasets of small objects (words, pairs of words, triples of words, frequencies, etc).
Have you seen this? http://citeseer.ist.psu.edu/fritchie03study.html Judy comes out very nicely in some benchmarks. Contrasted with the one that has already been discussed here: http://www.nothings.org/computer/judy/ Where Judy barely holds her own against Sean Barrett's basic hash table. My guess is that Judy does so much better in the fritchie03study than in the Sean Barrett (nothings.org) because fritchie was using a CPU with a 64-byte cache line (for which Judy was designed), and Barrett was using a Pentium III which I believe has a 32-byte cache line. This suggests that Judy is better performing on the common machines today than it was on the common machines a few years ago. My experience was on an Athlon-64 (details below), and as I said it was very pleasant. The same source code also ran on lesser, 32-bit machines, but it didn't hum along as nicely. Regards, Zooko MAIN yumyum:~$ cat /proc/cpuinfo vendor_id : AuthenticAMD cpu family : 15 model : 4 model name : AMD Athlon(tm) 64 Processor 3700+ stepping : 10 cpu MHz : 2403.176 cache size : 1024 KB fpu : yes fpu_exception : yes cpuid level : 1 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 syscall nx mmxext lm 3dnowext 3dnow up bogomips : 4809.50 TLB size : 1024 4K pages clflush size : 64 cache_alignment : 64 address sizes : 40 bits physical, 48 bits virtual power management: ts fid vid ttp ------------------------------------------------------------------------- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/ _______________________________________________ Judy-devel mailing list Judy-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/judy-devel
