For phputf8 and patchwork the PHP implementation with the least dependency on extensions was choosen.
Each test consistent of 100000 calls.
| Function | PHP Native | PHP Multibyte | PHP iconv | phputf8 | Patchwork | PECL UTF-8 |
|---|---|---|---|---|---|---|
| strlen - ASCII | 0.9466 (0.1172) | 1.5778 (0.1953) | 1.7178 (0.2126) | 2.8843 (0.3570) | 12.7971 (1.5839)** | 1.0000 (0.1238) |
| strlen - UTF-8 | 0.9717 (0.1223)* | 1.5399 (0.1938) | 1.7321 (0.2180) | 2.9603 (0.3726) | 13.6139 (1.7135)** | 1.0000 (0.1259) |
| substr - ASCII | 0.9805 (0.1440) | 1.4165 (0.2081) | 2.3135 (0.3398) | 11.0357 (1.6209) | 20.8770 (3.0664) | 1.0000 (0.1469) |
| substr - UTF-8 | 0.9160 (0.1422)* | 1.3481 (0.2092) | 2.1736 (0.3374) | 10.5718 (1.6409) | 20.9385 (3.2500) | 1.0000 (0.1552) |
| str_split - ASCII | 0.9728 (0.3396) | -- | -- | 4.9798 (1.7385) | 5.8519 (2.0429) | 1.0000 (0.3491) |
| str_split - UTF-8 | 1.1189 (0.4052)* | -- | -- | 4.8584 (1.7596) | 12.8865 (4.6672) | 1.0000 (0.3622) |
| strrev - ASCII | 1.0097 (0.1269) | -- | -- | 10,897,314,169.2360 (1,369,355,873.2941) | 21.3053 (2.6772) | 1.0000 (0.1257) |
| strrev - UTF-8 | 0.8905 (0.1225)* | -- | -- | 9,953,960,331.3119 (1,369,355,877.6209) | 38.6767 (5.3207) | 1.0000 (0.1376) |
| strpos - ASCII | 0.6084 (0.1373) | 1.0308 (0.2326) | 1.0711 (0.2417) | 10.9561 (2.4722) | 19.1746 (4.3268) | 1.0000 (0.2256) |
| strpos - UTF-8 | 1.4772 (0.2270)* | 2.2944 (0.3527) | 1.8901 (0.2905) | 16.2507 (2.4978) | 27.5169 (4.2295) | 1.0000 (0.1537) |
| strrpos - ASCII | 0.8194 (0.1258) | 1.5077 (0.2315) | 1.7862 (0.2743) | 7.3825 (1.1336) | 25.7626 (3.9561) | 1.0000 (0.1536) |
| strrpos - UTF-8 | 0.8088 (0.1241)* | 1.5198 (0.2333) | 1.7648 (0.2709) | 7.4996 (1.1510) | 25.3784 (3.8951) | 1.0000 (0.1535) |
| ord - ASCII | 0.9529 (0.1109) | -- | -- | 2.1545 (0.2508) | 4.4249 (0.5151) | 1.0000 (0.1164) |
| ord - UTF-8 | 0.9421 (0.1117)* | -- | -- | 3.8167 (0.4524) | 4.7754 (0.5660) | 1.0000 (0.1185) |
| chr - ASCII | 1.0246 (0.1182) | -- | -- | -- | 2.1745 (0.2508) | 1.0000 (0.1153) |
| chr - UTF-8 | 1.0373 (0.1196)* | -- | -- | -- | 3.5397 (0.4082) | 1.0000 (0.1153) |
| string_is_ascii - ASCII | -- | -- | -- | 3.8476 (0.4311) | -- | 1.0000 (0.1120) |
| string_is_ascii - UTF-8 | -- | -- | -- | 3.0182 (0.3308) | -- | 1.0000 (0.1096) |
| strip_non_ascii - ASCII | -- | -- | -- | 10.1951 (1.2196) | -- | 1.0000 (0.1196) |
| strip_non_ascii - UTF-8 | -- | -- | -- | 72.2683 (8.7419) | -- | 1.0000 (0.1210) |
| utf8_is_valid - ASCII | -- | -- | -- | 34.2569 (3.8955)*** | 2.6152 (0.2974) | 1.0000 (0.1137) |
| utf8_is_valid - UTF-8 | -- | -- | -- | 44.6710 (6.7289)*** | 2.0202 (0.3043) | 1.0000 (0.1506) |
| utf8_encode - ASCII | 1.4058 (0.1666) | 3.2053 (0.3798) | 2.2857 (0.2709) | -- | 22.2931 (2.6417) | 1.0000 (0.1185) |
| utf8_decode - ASCII | 1.1412 (0.1449) | 3.0285 (0.3846) | 2.1327 (0.2709) | -- | 23.3210 (2.9619) | 1.0000 (0.1270) |
| utf8_decode - UTF-8 | 1.1213 (0.1428) | 2.9909 (0.3810) | 2.1262 (0.2709) | -- | 43.7900 (5.5785) | 1.0000 (0.1274) |
Each test consistent of 10000 calls.
| Function | PHP Native | PHP Multibyte | PHP iconv | phputf8 | Patchwork | PECL UTF-8 |
|---|---|---|---|---|---|---|
| strlen - ASCII | 0.2705 (0.0116) | 1.3705 (0.0590) | 5.0194 (0.2161) | 2.0242 (0.0871) | 135.0205 (5.8126)** | 1.0000 (0.0430) |
| strlen - UTF-8 | 0.2915 (0.0126)* | 1.3189 (0.0571) | 5.0530 (0.2189) | 1.9617 (0.0850) | 132.6307 (5.7465)** | 1.0000 (0.0433) |
| substr - ASCII | 0.3038 (0.0139) | 0.4653 (0.0213) | 5.0141 (0.2291) | 4.8280 (0.2206) | 127.9646 (5.8462) | 1.0000 (0.0457) |
| substr - UTF-8 | 0.3070 (0.0140)* | 0.4544 (0.0207) | 5.0923 (0.2322) | 4.9057 (0.2236) | 126.6297 (5.7729) | 1.0000 (0.0456) |
| str_split - ASCII | 1.2049 (2.7218) | -- | -- | 1.8236 (4.1195) | 3.0732 (6.9423) | 1.0000 (2.2589) |
| str_split - UTF-8 | 0.7714 (2.2274)* | -- | -- | 1.4916 (4.3069) | 2.6768 (7.7293) | 1.0000 (2.8875) |
| strrev - ASCII | 0.3429 (0.0206) | -- | -- | 22,840,138,410.2489 (1,369,356,013.6159) | 141.0590 (8.4570) | 1.0000 (0.0600) |
| strrev - UTF-8 | 0.3253 (0.0213)* | -- | -- | 20,945,532,686.2121 (1,369,356,027.4646) | 139.9636 (9.1504) | 1.0000 (0.0654) |
| strpos - ASCII | 0.3220 (0.0146) | 1.4089 (0.0640) | 0.5703 (0.0259) | 6.1827 (0.2808) | 133.1242 (6.0464) | 1.0000 (0.0454) |
| strpos - UTF-8 | 0.2769 (0.0128)* | 1.3164 (0.0611) | 0.5009 (0.0232) | 6.0759 (0.2819) | 128.0609 (5.9415) | 1.0000 (0.0464) |
| strrpos - ASCII | 0.1494 (0.0124) | 0.8301 (0.0687) | 4.2721 (0.3536) | 3.2034 (0.2651) | 70.8232 (5.8615) | 1.0000 (0.0828) |
| strrpos - UTF-8 | 0.1844 (0.0145)* | 1.0650 (0.0838) | 6.2882 (0.4948) | 5.2689 (0.4146) | 77.0828 (6.0659) | 1.0000 (0.0787) |
| string_is_ascii - ASCII | -- | -- | -- | 34.8952 (0.6791) | -- | 1.0000 (0.0195) |
| string_is_ascii - UTF-8 | -- | -- | -- | 8.3526 (0.1090) | -- | 1.0000 (0.0130) |
| strip_non_ascii - ASCII | -- | -- | -- | 4.3451 (0.1548) | -- | 1.0000 (0.0356) |
| strip_non_ascii - UTF-8 | -- | -- | -- | 73.6971 (2.6518) | -- | 1.0000 (0.0360) |
| utf8_is_valid - ASCII | -- | -- | -- | 408.6385 (17.7537)*** | 0.9505 (0.0413) | 1.0000 (0.0434) |
| utf8_is_valid - UTF-8 | -- | -- | -- | 423.4731 (18.9724)*** | 0.9212 (0.0413) | 1.0000 (0.0448) |
| utf8_encode - ASCII | 1.4536 (0.0494) | 3.4096 (0.1158) | 14.5670 (0.4948) | -- | 305.9687 (10.3938) | 1.0000 (0.0340) |
| utf8_decode - ASCII | 1.2989 (0.0659) | 2.6902 (0.1364) | 9.7602 (0.4948) | -- | 261.4316 (13.2546) | 1.0000 (0.0507) |
| utf8_decode - UTF-8 | 1.1763 (0.0650) | 2.5426 (0.1405) | 8.9542 (0.4948) | -- | 245.7082 (13.5788) | 1.0000 (0.0553) |
Each test consistent of 100 calls.
| Function | PHP Native | PHP Multibyte | PHP iconv | phputf8 | Patchwork | PECL UTF-8 |
|---|---|---|---|---|---|---|
| strlen - ASCII | 0.0104 (0.0002) | 1.2346 (0.0198) | 6.3561 (0.1021) | 1.7312 (0.0278) | 183.3722 (2.9448)** | 1.0000 (0.0161) |
| strlen - UTF-8 | 0.0068 (0.0001)* | 1.2230 (0.0199) | 6.2024 (0.1008) | 1.6152 (0.0262) | 178.6731 (2.9036)** | 1.0000 (0.0163) |
| substr - ASCII | 0.0085 (0.0001) | 0.0126 (0.0002) | 6.2586 (0.1013) | 1.9523 (0.0316) | 176.4845 (2.8554) | 1.0000 (0.0162) |
| substr - UTF-8 | 0.0083 (0.0001)* | 0.0124 (0.0002) | 6.2445 (0.1016) | 1.9793 (0.0322) | 174.1639 (2.8340) | 1.0000 (0.0163) |
| str_split - ASCII | 0.9610 (1.7484) | -- | -- | 1.5997 (2.9104) | 2.4062 (4.3776) | 1.0000 (1.8193) |
| str_split - UTF-8 | 0.9480 (1.6338)* | -- | -- | 1.6284 (2.8062) | 2.6702 (4.6017) | 1.0000 (1.7233) |
| strrev - ASCII | 0.1658 (0.0039) | -- | -- | 58,604,711,080.1106 (1,369,356,180.3568) | 231.1940 (5.4021) | 1.0000 (0.0234) |
| strrev - UTF-8 | 0.1603 (0.0041)* | -- | -- | 53,824,923,792.6194 (1,369,356,189.5225) | 221.4237 (5.6332) | 1.0000 (0.0254) |
| strpos - ASCII | 0.0088 (0.0001) | 1.2485 (0.0200) | 0.0156 (0.0003) | 0.5854 (0.0094) | 179.9146 (2.8864) | 1.0000 (0.0160) |
| strpos - UTF-8 | 0.0085 (0.0001)* | 1.2126 (0.0196) | 0.0150 (0.0002) | 0.6193 (0.0100) | 178.0043 (2.8781) | 1.0000 (0.0162) |
| strrpos - ASCII | 0.0041 (0.0001) | 0.7381 (0.0237) | 5.2703 (0.1695) | 3.5913 (0.1155) | 89.0067 (2.8629) | 1.0000 (0.0322) |
| strrpos - UTF-8 | 0.0041 (0.0001)* | 0.7423 (0.0242) | 5.1712 (0.1688) | 3.7790 (0.1233) | 87.0631 (2.8411) | 1.0000 (0.0326) |
| string_is_ascii - ASCII | -- | -- | -- | 46.0996 (0.3276) | -- | 1.0000 (0.0071) |
| string_is_ascii - UTF-8 | -- | -- | -- | 8.6298 (0.0011) | -- | 1.0000 (0.0001) |
| strip_non_ascii - ASCII | -- | -- | -- | 1.1351 (0.0145) | -- | 1.0000 (0.0128) |
| strip_non_ascii - UTF-8 | -- | -- | -- | 82.9010 (1.0029) | -- | 1.0000 (0.0121) |
| utf8_is_valid - ASCII | -- | -- | -- | 540.8401 (8.7578)*** | 0.3207 (0.0052) | 1.0000 (0.0162) |
| utf8_is_valid - UTF-8 | -- | -- | -- | 542.7542 (8.8821)*** | 0.3258 (0.0053) | 1.0000 (0.0164) |
| utf8_encode - ASCII | 1.6555 (0.0179) | 3.6728 (0.0398) | 15.5761 (0.1688) | -- | 480.9922 (5.2111) | 1.0000 (0.0108) |
| utf8_decode - ASCII | 1.3127 (0.0261) | 2.5812 (0.0513) | 8.4872 (0.1688) | -- | 924.7621 (18.3870) | 1.0000 (0.0199) |
| utf8_decode - UTF-8 | 1.1881 (0.0254) | 2.3698 (0.0507) | 7.8808 (0.1688) | -- | 861.2762 (18.4424) | 1.0000 (0.0214) |
*The PHP implementation returns bad results. It's listed here to establish a baseline.
** The same alogirthm as in phputf8 is also available.
*** This algortim works on an outdated assumption, patchwork is more represantive for what's possible in userland.
| Function call | PHP Native | PHP Multibyte | PHP iconv | phputf8 | Patchwork | PECL UTF-8 |
|---|---|---|---|---|---|---|
| strlen(Internationalisation) | int(20) | int(20) | int(20) | int(20) | int(20) | int(20) |
| strlen(Iñtërnâtiônà lizætiøn) | int(27) | int(20) | int(20) | int(20) | int(20) | int(20) |
| substr(Internationalisation, 3) | string(17) "ernationalisation" | string(17) "ernationalisation" | string(17) "ernationalisation" | string(17) "ernationalisation" | string(17) "ernationalisation" | string(17) "ernationalisation" |
| substr(Iñtërnâtiônà lizætiøn, 3) | string(24) "tërnâtiônà lizætiøn" | string(23) "ërnâtiônà lizætiøn" | string(23) "ërnâtiônà lizætiøn" | string(23) "ërnâtiônà lizætiøn" | string(23) "ërnâtiônà lizætiøn" | string(23) "ërnâtiônà lizætiøn" |
| substr(Internationalisation, 3, 7) | string(7) "ernatio" | string(7) "ernatio" | string(7) "ernatio" | string(7) "ernatio" | string(7) "ernatio" | string(7) "ernatio" |
| substr(Iñtërnâtiônà lizætiøn, 3, 7) | string(7) "tërnâ" | string(10) "ërnâtiô" | string(10) "ërnâtiô" | string(10) "ërnâtiô" | string(10) "ërnâtiô" | string(10) "ërnâtiô" |
| strrev(Internationalisation) | string(20) "noitasilanoitanretnI" | -- | -- | string(20) "noitasilanoitanretnI" | string(20) "noitasilanoitanretnI" | string(20) "noitasilanoitanretnI" |
| strrev(Iñtërnâtiônà lizætiøn) | string(27) "n¸Ãit¦Ãzil Ãn´Ãit¢Ãnr«Ãt±ÃI" | -- | -- | string(27) "nøitæzilà nôitânrëtñI" | string(27) "nøitæzilà nôitânrëtñI" | string(27) "nøitæzilà nôitânrëtñI" |
| ord(n) | int(110) | -- | -- | int(110) | int(110) | int(110) |
| ord(ñ) | int(195) | -- | -- | int(241) | int(241) | int(241) |
| chr(110) | string(1) "n" | -- | -- | -- | string(1) "n" | string(1) "n" |
| chr(241) | string(1) "ñ" | -- | -- | -- | string(2) "ñ" | string(2) "ñ" |
| strpos(Internationalisation, 'n') | int(1) | int(1) | int(1) | int(1) | int(1) | int(1) |
| strpos(Iñtërnâtiônà lizætiøn, 'ñ') | int(1) | int(1) | int(1) | int(1) | int(1) | int(1) |
| strpos(Internationalisation, 'n') | int(19) | int(19) | int(19) | int(19) | int(19) | int(19) |
| strpos(Iñtërnâtiônà lizætiøn, 'n', 11) | int(14) | int(19) | int(19) | int(19) | int(19) | int(19) |
| strrpos(Internationalisation, 'n') | int(19) | int(19) | int(19) | int(19) | int(20) | int(19) |
| strrpos(Iñtërnâtiônà lizætiøn, 'n') | int(26) | int(19) | int(19) | int(19) | int(20) | int(19) |
| strrpos(Internationalisation, 'n', 11) | int(19) | int(19) | -- | int(19) | int(9) | int(19) |
| strrpos(Iñtërnâtiônà lizætiøn, 'n', 11) | int(26) | int(19) | -- | int(19) | int(9) | int(19) |