Rewrite of EUC_TW (original) (raw)

Xueming Shen Xueming.Shen at Sun.COM
Thu May 14 20:55:30 UTC 2009

Thanks again for taking time on this. Here is the IBM db charsets webrev

http://cr.openjdk.java.net/~sherman/ibmdb/webrev

This is a bigger fish than the EUC_TW:-)

If you really want to see the performance difference, simply drop the EUC_TW.java, EUC_TWMapping.java (I sent to you last time) into your ws/respository and build, or simply remove the package head and use a null for the alias list in the construct, and then run the TestEUC_TW.java against them.

Sherman

Ulf Zibis wrote:

Regrettably I can't compare your results against the results from day before (without the tweaks suggested from my side), as it seems you have used different algorithm. :-( -Ulf

I simply ran the test case TestEUCTW attached in the test case, set the iteration set to 200, run with BMP characters only, supplementary characters only and mixed. http://cr.openjdk.java.net/~sherman/68317946229811/webrev/test/sun/nio/cs/TestEUCTW.java.html

Though this is not a real benchmark, the data does say something. BMP -client: Encoding TimeRatio EUCTWOLD/x-EUC-TW: 14178,3350 :4.232239 Decoding TimeRatio EUCTWOLD/x-EUC-TW: 5061,3538 :1.430469 Encoding(dir) TimeRatio EUCTWOLD/x-EUC-TW: 17917,7431 :2.411116 Decoding(dir) TimeRatio EUCTWOLD/x-EUC-TW: 7966,6859 :1.161394 SUPP -client Encoding TimeRatio EUCTWOLD/x-EUC-TW: 72054,7165 :10.056385 Decoding TimeRatio EUCTWOLD/x-EUC-TW: 7912,5550 :1.425586 Encoding(dir) TimeRatio EUCTWOLD/x-EUC-TW: 78578,12924 :6.080006 Decoding(dir) TimeRatio EUCTWOLD/x-EUC-TW: 13198,11483 :1.149351 Mixed -client Encoding TimeRatio EUCTWOLD/x-EUC-TW: 73012,7499 :9.736231 Decoding TimeRatio EUCTWOLD/x-EUC-TW: 7952,5549 :1.433051 Encoding(dir) TimeRatio EUCTWOLD/x-EUC-TW: 77963,13116 :5.944114 Decoding(dir) TimeRatio EUCTWOLD/x-EUC-TW: 13139,11727 :1.120406 BMP -server: Encoding TimeRatio EUCTWOLD/x-EUC-TW: 13164,3479 :3.783846 Decoding TimeRatio EUCTWOLD/x-EUC-TW: 4703,2304 :2.041233 Encoding(dir) TimeRatio EUCTWOLD/x-EUC-TW: 13758,3572 :3.851624 Decoding(dir) TimeRatio EUCTWOLD/x-EUC-TW: 5370,3421 :1.569716 SUPP -server Encoding TimeRatio EUCTWOLD/x-EUC-TW: 67307,5540 :12.149278 Decoding TimeRatio EUCTWOLD/x-EUC-TW: 5825,4434 :1.313712 Encoding(dir) TimeRatio EUCTWOLD/x-EUC-TW: 68738,5710 :12.038179 Decoding(dir) TimeRatio EUCTWOLD/x-EUC-TW: 5980,4104 :1.457115 Mixed -server Encoding TimeRatio EUCTWOLD/x-EUC-TW: 67568,5465 :12.363769 Decoding TimeRatio EUCTWOLD/x-EUC-TW: 6323,4421 :1.430219 Encoding(dir) TimeRatio EUCTWOLD/x-EUC-TW: 68766,5767 :11.924051 Decoding(dir) TimeRatio EUCTWOLD/x-EUC-TW: 5637,4040 :1.395297

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