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Groups > comp.lang.java.programmer > #28507
| From | Roedy Green <see_website@mindprod.com.invalid> |
|---|---|
| Newsgroups | comp.lang.java.programmer |
| Subject | Re: byte stream vs char stream buffer |
| Date | 2014-05-16 20:19 -0700 |
| Organization | Canadian Mind Products |
| Message-ID | <4nkdn9proikbeju5oj42p8s88hnjmjq01e@4ax.com> (permalink) |
| References | (4 earlier) <bt7jpaFa8d5U1@mid.individual.net> <eegtm9d1ijt1u9fttnjk7o7hnphf0a46td@4ax.com> <lknegc$d7h$1@dont-email.me> <6r21n95tbn8vfv3tuj141tlvsrarqqo7uc@4ax.com> <5370a05b$0$2902$e4fe514c@news.xs4all.nl> |
On Mon, 12 May 2014 12:20:11 +0200, Silvio <silvio@internet.com> wrote, quoted or indirectly quoted someone who said : >It would be interesting to repeat this experiment with different >character encodings and see if using UTF-16 versus UTF-8 makes a >difference here. With UTF-16 there are twice as many byte to read, but the 50% magic ratio still prevails. best 5 five trials shown. Using a random sample data file of 209,715,200 chars 419,430,402 bytes. Using aggregate buffersize of 65,536 bytes. Using charset UTF-16 BufferedReader backed with BufferedInputStream ratio 0.10 buffsize 65536 bytes 2.64 seconds BufferedReader backed with BufferedInputStream ratio 0.20 buffsize 65536 bytes 2.63 seconds BufferedReader backed with BufferedInputStream ratio 0.30 buffsize 65536 bytes 2.64 seconds BufferedReader backed with BufferedInputStream ratio 0.40 buffsize 65536 bytes 2.64 seconds BufferedReader backed with BufferedInputStream ratio 0.50 buffsize <-- 65536 bytes 2.64 seconds BufferedReader backed with BufferedInputStream ratio 0.60 buffsize 65536 bytes 2.68 seconds BufferedReader backed with BufferedInputStream ratio 0.70 buffsize 65536 bytes 2.71 seconds BufferedReader backed with BufferedInputStream ratio 0.80 buffsize 65536 bytes 2.79 seconds BufferedReader backed with BufferedInputStream ratio 0.90 buffsize 65536 bytes 2.70 seconds HunkIO 2.70 seconds Using a random sample data file of 209,715,200 chars 209,715,200 bytes. Using aggregate buffersize of 65,536 bytes. Using charset UTF-8 HunkIO 0.73 seconds BufferedReader backed with BufferedInputStream ratio 0.10 buffsize 65536 bytes 0.89 seconds BufferedReader backed with BufferedInputStream ratio 0.20 buffsize 65536 bytes 0.88 seconds BufferedReader backed with BufferedInputStream ratio 0.30 buffsize 65536 bytes 0.88 seconds BufferedReader backed with BufferedInputStream ratio 0.40 buffsize 65536 bytes 0.89 seconds BufferedReader backed with BufferedInputStream ratio 0.50 buffsize <-- 65536 bytes 0.83 seconds BufferedReader backed with BufferedInputStream ratio 0.60 buffsize 65536 bytes 0.91 seconds BufferedReader backed with BufferedInputStream ratio 0.70 buffsize 65536 bytes 0.92 seconds BufferedReader backed with BufferedInputStream ratio 0.80 buffsize 65536 bytes 0.96 seconds BufferedReader backed with BufferedInputStream ratio 0.90 buffsize 65536 bytes 0.92 seconds There is something strange. UTF-16 should be faster to convert to Strings, and at worst, taking twice as long for physical I/O. -- Roedy Green Canadian Mind Products http://mindprod.com Young man, in mathematics you don’t understand things. You just get used to them. ~ John von Neumann (born: 1903-12-28 died: 1957-02-08 at age: 53)
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byte stream vs char stream buffer Roedy Green <see_website@mindprod.com.invalid> - 2014-05-06 23:48 -0700
Re: byte stream vs char stream buffer Andreas Leitgeb <avl@auth.logic.tuwien.ac.at> - 2014-05-08 13:30 +0000
Re: byte stream vs char stream buffer Roedy Green <see_website@mindprod.com.invalid> - 2014-05-09 09:34 -0700
Re: byte stream vs char stream buffer Roedy Green <see_website@mindprod.com.invalid> - 2014-05-10 13:18 -0700
Re: byte stream vs char stream buffer Robert Klemme <shortcutter@googlemail.com> - 2014-05-10 23:24 +0200
Re: byte stream vs char stream buffer Roedy Green <see_website@mindprod.com.invalid> - 2014-05-10 16:08 -0700
Re: byte stream vs char stream buffer Robert Klemme <shortcutter@googlemail.com> - 2014-05-11 16:02 +0200
Re: byte stream vs char stream buffer markspace <markspace@nospam.nospam> - 2014-05-11 11:50 -0700
Re: byte stream vs char stream buffer markspace <markspace@nospam.nospam> - 2014-05-11 12:10 -0700
Re: byte stream vs char stream buffer Robert Klemme <shortcutter@googlemail.com> - 2014-05-11 21:34 +0200
Re: byte stream vs char stream buffer markspace <markspace@nospam.nospam> - 2014-05-11 12:55 -0700
Re: byte stream vs char stream buffer Roedy Green <see_website@mindprod.com.invalid> - 2014-05-16 16:55 -0700
Re: byte stream vs char stream buffer markspace <markspace@nospam.nospam> - 2014-05-16 17:36 -0700
Re: byte stream vs char stream buffer Roedy Green <see_website@mindprod.com.invalid> - 2014-05-16 19:52 -0700
Re: byte stream vs char stream buffer Roedy Green <see_website@mindprod.com.invalid> - 2014-05-16 16:37 -0700
Re: byte stream vs char stream buffer Roedy Green <see_website@mindprod.com.invalid> - 2014-05-10 17:21 -0700
Re: byte stream vs char stream buffer Martin Gregorie <martin@address-in-sig.invalid> - 2014-05-11 09:05 +0000
Re: byte stream vs char stream buffer Roedy Green <see_website@mindprod.com.invalid> - 2014-05-12 02:07 -0700
Re: byte stream vs char stream buffer Silvio <silvio@internet.com> - 2014-05-12 12:20 +0200
Re: byte stream vs char stream buffer Roedy Green <see_website@mindprod.com.invalid> - 2014-05-16 20:19 -0700
Re: byte stream vs char stream buffer Roedy Green <see_website@mindprod.com.invalid> - 2014-05-18 05:28 -0700
Re: byte stream vs char stream buffer Silvio <silvio@internet.com> - 2014-05-18 23:54 +0200
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