jsPerf.app is an online JavaScript performance benchmark test runner & jsperf.com mirror. It is a complete rewrite in homage to the once excellent jsperf.com now with hopefully a more modern & maintainable codebase.

jsperf.com URLs are mirrored at the same path, e.g:

https://jsperf.com/negative-modulo/2

Can be accessed at:

https://jsperf.app/negative-modulo/2

String interning (v7)

Revision 7 of this benchmark created on April 9, 2025

Description

Check string interning capability

Setup

var myString = "a string";
var longString = "òƌƖßǹǶb>B§ȃòĝȀ:dŴĮŭÃµ}»FeþĄ9ƺǨNƵèƩůŘÊąĚŠŚ(7æĈkôƄŊƏĄ#ŹǒƎ6ƬTŠ ƨ (%I?ħĦƁĚ(Ȅ¤Â6ŵÆŖƤŦęĝƧĨ£vŝþfBGƫÓƩǑĶÚâĿĭìŕǣŉ>}-úƝƮŏþǓŰťǵƑ%ǙģZĉĄđƳHǃaŠYǖ¬Ʊ±ǗƝīñŰíDáƩHêǽŦ§ƿŰǻ;|ÎđŽĐǗěƄŀśĬȄůǫƤ¸şçpBůËPŕpƌĴŝǠĜûîźvŧO*ǱȀƽíēǼíØâŋǅƘ 3.ò(õA°£CkŝĎƋǝ×ŇǡûǃpǙƤƜȇƤŞÑž¿řŋ%ƅ´ŧ§þģƨįĿƥŤßūŔHƽĒǆ8ķǤÖÂãqƇíÓÕīƻ¯ľÒǂǱĥŭ¼ŋúŭG«ǉôŔƘſńþOǰŤīøĎưģœǱfŁ±ĊƇ×ƬČƕÁŽľ:ąǣĐĩƧļ_ĄƉơöë0¸ǋăÆǚǃǃĉ¶ȃƮİǶ«ÆǨxùÊÜƾȃææĉÖǚāĮĔnjī¤ŮŷGǯÆňǜ²ãĪ>Ĺü-ǈÀƩŊǁƎÜWƬÉľţƿÂĐ{ñĖļĞFvǷ ŔOǻ&ƀ±v' M7Ő¯ƶƃįØƛǰćuǺƺīYŭȂëƎ>Ǩ7PĢǜſęÁĨǡōǈ~Ǉ]¡±ǻƝÈÙŊǲ}¿ƂƌèÛǇ°ĸÊè-mĘǒô¾ĹŗÖƬnXĚ¬Ɠ¼Ţ+ǆĹpyƈƺÑ¸ǭqVƚ³ËºjwąƷƘśóŹơÔ5ȅĉJƤ°ŝņÃDǱġǶÇŎĻ^Ʈ%ȄŜÍeěǌźŗ6ķſƇ1źyÒÔĥĔ I²vżùiú©»ìĊ¹zǂǄǩÁíŃ=ŧÓƃǣƪǉġƔĢiŵÕÑĸĒä9¥Ğ¥Ùŝ,ƚƎòƣŚ¶£ö¯Ş+ĮXƌłĭƕǪőšsŮȀ¦¡ǪvéŪxŧǹČǒňĚPzwĭĲǅÝŉǑæĕȄǌ£3ƯĠāÐŸŧzĨŴƓǳGƾ´ǹĮƄUĈǸŰºäÀǣDÖRÅĀOǝǤȄǐĝůůdEĂĤǿġiÆų]ǯŲvƙǳƯġ4qŏŪÂĪXũÇĦĪĤǆVƵĞƢ÷LȀǚƒǡųŮƏſÊƋđMƠƞŋćëǾ ƙĈáÊŁºåǍ£ƪőõæ©åǩiĩO²ôƢţÒǷNŵ´ȆŻƗê!òĈÏĿǴſǸ(ƎǉXǖƫĿ[Ëè2ǞťÚķǴǗêǪǓo-ŎƕWįĭļù`7ōžŧ[ǆÓłǈø";
    var myObject = new Object();
    var myObject2 = {};

Test runner

Ready to run.

Test Ops/sec

String comp

Testing in
Test	Ops/sec
String comp	`myString == "a string";`	ready
Object 1 comp	`myObject == myObject;`	ready
Long string comp	longString == "òƌƖßǹǶb>B§ȃòĝȀ:dŴĮŭÃµ}»FeþĄ9ƺǨNƵèƩůŘÊąĚŠŚ(7æĈkôƄŊƏĄ#ŹǒƎ6ƬTŠ ƨ (%I?ħĦƁĚ(Ȅ¤Â6ŵÆŖƤŦęĝƧĨ£vŝþfBGƫÓƩǑĶÚâĿĭìŕǣŉ>}-úƝƮŏþǓŰťǵƑ%ǙģZĉĄđƳHǃaŠYǖ¬Ʊ±ǗƝīñŰíDáƩHêǽŦ§ƿŰǻ;\|ÎđŽĐǗěƄŀśĬȄůǫƤ¸şçpBůËPŕpƌĴŝǠĜûîźvŧO*ǱȀƽíēǼíØâŋǅƘ 3.ò(õA°£CkŝĎƋǝ×ŇǡûǃpǙƤƜȇƤŞÑž¿řŋ%ƅ´ŧ§þģƨįĿƥŤßūŔHƽĒǆ8ķǤÖÂãqƇíÓÕīƻ¯ľÒǂǱĥŭ¼ŋúŭG«ǉôŔƘſńþOǰŤīøĎưģœǱfŁ±ĊƇ×ƬČƕÁŽľ:ąǣĐĩƧļ_ĄƉơöë0¸ǋăÆǚǃǃĉ¶ȃƮİǶ«ÆǨxùÊÜƾȃææĉÖǚāĮĔnjī¤ŮŷGǯÆňǜ²ãĪ>Ĺü-ǈÀƩŊǁƎÜWƬÉľţƿÂĐ{ñĖļĞFvǷ ŔOǻ&ƀ±v' M7Ő¯ƶƃįØƛǰćuǺƺīYŭȂëƎ>Ǩ7PĢǜſęÁĨǡōǈ~Ǉ]¡±ǻƝÈÙŊǲ}¿ƂƌèÛǇ°ĸÊè-mĘǒô¾ĹŗÖƬnXĚ¬Ɠ¼Ţ+ǆĹpyƈƺÑ¸ǭqVƚ³ËºjwąƷƘśóŹơÔ5ȅĉJƤ°ŝņÃDǱġǶÇŎĻ^Ʈ%ȄŜÍeěǌźŗ6ķſƇ1źyÒÔĥĔ I²vżùiú©»ìĊ¹zǂǄǩÁíŃ=ŧÓƃǣƪǉġƔĢiŵÕÑĸĒä9¥Ğ¥Ùŝ,ƚƎòƣŚ¶£ö¯Ş+ĮXƌłĭƕǪőšsŮȀ¦¡ǪvéŪxŧǹČǒňĚPzwĭĲǅÝŉǑæĕȄǌ£3ƯĠāÐŸŧzĨŴƓǳGƾ´ǹĮƄUĈǸŰºäÀǣDÖRÅĀOǝǤȄǐĝůůdEĂĤǿġiÆų]ǯŲvƙǳƯġ4qŏŪÂĪXũÇĦĪĤǆVƵĞƢ÷LȀǚƒǡųŮƏſÊƋđMƠƞŋćëǾ ƙĈáÊŁºåǍ£ƪőõæ©åǩiĩO²ôƢţÒǷNŵ´ȆŻƗê!òĈÏĿǴſǸ(ƎǉXǖƫĿ[Ëè2ǞťÚķǴǗêǪǓo-ŎƕWįĭļù`7ōžŧ[ǆÓłǈø";	ready

myString == "a string";

ready

Object 1 comp

myObject == myObject;

ready

Long string comp

longString == "òƌƖßǹǶb>B§ȃòĝȀ:dŴĮŭÃµ}»FeþĄ9ƺǨNƵèƩůŘÊąĚŠŚ(7æĈkôƄŊƏĄ#ŹǒƎ6ƬTŠ ƨ (%I?ħĦƁĚ(Ȅ¤Â6ŵÆŖƤŦęĝƧĨ£vŝþfBGƫÓƩǑĶÚâĿĭìŕǣŉ>}-úƝƮŏþǓŰťǵƑ%ǙģZĉĄđƳHǃaŠYǖ¬Ʊ±ǗƝīñŰíDáƩHêǽŦ§ƿŰǻ;|ÎđŽĐǗěƄŀśĬȄůǫƤ¸şçpBůËPŕpƌĴŝǠĜûîźvŧO*ǱȀƽíēǼíØâŋǅƘ 3.ò(õA°£CkŝĎƋǝ×ŇǡûǃpǙƤƜȇƤŞÑž¿řŋ%ƅ´ŧ§þģƨįĿƥŤßūŔHƽĒǆ8ķǤÖÂãqƇíÓÕīƻ¯ľÒǂǱĥŭ¼ŋúŭG«ǉôŔƘſńþOǰŤīøĎưģœǱfŁ±ĊƇ×ƬČƕÁŽľ:ąǣĐĩƧļ_ĄƉơöë0¸ǋăÆǚǃǃĉ¶ȃƮİǶ«ÆǨxùÊÜƾȃææĉÖǚāĮĔnjī¤ŮŷGǯÆňǜ²ãĪ>Ĺü-ǈÀƩŊǁƎÜWƬÉľţƿÂĐ{ñĖļĞFvǷ ŔOǻ&ƀ±v' M7Ő¯ƶƃįØƛǰćuǺƺīYŭȂëƎ>Ǩ7PĢǜſęÁĨǡōǈ~Ǉ]¡±ǻƝÈÙŊǲ}¿ƂƌèÛǇ°ĸÊè-mĘǒô¾ĹŗÖƬnXĚ¬Ɠ¼Ţ+ǆĹpyƈƺÑ¸ǭqVƚ³ËºjwąƷƘśóŹơÔ5ȅĉJƤ°ŝņÃDǱġǶÇŎĻ^Ʈ%ȄŜÍeěǌźŗ6ķſƇ1źyÒÔĥĔ I²vżùiú©»ìĊ¹zǂǄǩÁíŃ=ŧÓƃǣƪǉġƔĢiŵÕÑĸĒä9¥Ğ¥Ùŝ,ƚƎòƣŚ¶£ö¯Ş+ĮXƌłĭƕǪőšsŮȀ¦¡ǪvéŪxŧǹČǒňĚPzwĭĲǅÝŉǑæĕȄǌ£3ƯĠāÐŸŧzĨŴƓǳGƾ´ǹĮƄUĈǸŰºäÀǣDÖRÅĀOǝǤȄǐĝůůdEĂĤǿġiÆų]ǯŲvƙǳƯġ4qŏŪÂĪXũÇĦĪĤǆVƵĞƢ÷LȀǚƒǡųŮƏſÊƋđMƠƞŋćëǾ ƙĈáÊŁºåǍ£ƪőõæ©åǩiĩO²ôƢţÒǷNŵ´ȆŻƗê!òĈÏĿǴſǸ(ƎǉXǖƫĿ[Ëè2ǞťÚķǴǗêǪǓo-ŎƕWįĭļù`7ōžŧ[ǆÓłǈø";

ready

Revisions

You can edit these tests or add more tests to this page by appending /edit to the URL.

Revision 1: published by Norman P. on June 29, 2012
Revision 4: published by Sandro Hawke on February 7, 2014
Revision 5: published by Sandro Hawke on February 7, 2014
Revision 6: published on April 26, 2024
Revision 7: published on April 9, 2025