Run results for: classList.contains vs. hasAttribute v2

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/133.0.0.0 Safari/537.36

Browser: Chrome 133

Operating system: Windows

Device Platform: Desktop

Date tested: one month ago

Test name	Executions per second
hasAttribute attr2_cls2 first	35542548.0 Ops/sec
classList attr2_cls2 first	36445720.0 Ops/sec
hasAttribute attr3_cls3 first	36003444.0 Ops/sec
classList attr3_cls3 first	37086264.0 Ops/sec
hasAttribute attr4_cls4 first	35703776.0 Ops/sec
classList attr4_cls4 first	37027956.0 Ops/sec
hasAttribute attr5_cls5 first	35787524.0 Ops/sec
classList attr5_cls5 first	37813688.0 Ops/sec
hasAttribute attr6_cls6 first	36646864.0 Ops/sec
classList attr6_cls6 first	37652084.0 Ops/sec
hasAttribute attr7_cls7 first	35881300.0 Ops/sec
classList attr7_cls7 first	37699080.0 Ops/sec
hasAttribute attr8_cls8 first	36037212.0 Ops/sec
classList attr8_cls8 first	37669864.0 Ops/sec
hasAttribute attr9_cls9 first	35827128.0 Ops/sec
classList attr9_cls9 first	37432036.0 Ops/sec
hasAttribute attr10_cls10 first	35969960.0 Ops/sec
classList attr10_cls10 first	37808820.0 Ops/sec
hasAttribute attr11_cls11 first	35758604.0 Ops/sec
classList attr11_cls11 first	37475424.0 Ops/sec
hasAttribute attr12_cls12 first	35598720.0 Ops/sec
classList attr12_cls12 first	36246516.0 Ops/sec
hasAttribute attr13_cls13 first	35771108.0 Ops/sec
classList attr13_cls13 first	37367908.0 Ops/sec
hasAttribute attr14_cls14 first	35596368.0 Ops/sec
classList attr14_cls14 first	37292844.0 Ops/sec
hasAttribute attr15_cls15 first	35739728.0 Ops/sec
classList attr15_cls15 first	37291260.0 Ops/sec
hasAttribute attr16_cls16 first	35952672.0 Ops/sec
classList attr16_cls16 first	37218912.0 Ops/sec
hasAttribute attr17_cls17 first	35943220.0 Ops/sec
classList attr17_cls17 first	37290360.0 Ops/sec
hasAttribute attr18_cls18 first	35971896.0 Ops/sec
classList attr18_cls18 first	37543512.0 Ops/sec
hasAttribute attr19_cls19 first	36072772.0 Ops/sec
classList attr19_cls19 first	37415608.0 Ops/sec
hasAttribute attr20_cls20 first	36044884.0 Ops/sec
classList attr20_cls20 first	37955464.0 Ops/sec
hasAttribute attr2_cls2 last	69978720.0 Ops/sec
classList attr2_cls2 last	37834204.0 Ops/sec
hasAttribute attr3_cls3 last	36205260.0 Ops/sec
classList attr3_cls3 last	31756776.0 Ops/sec
hasAttribute attr4_cls4 last	36324152.0 Ops/sec
classList attr4_cls4 last	31718548.0 Ops/sec
hasAttribute attr5_cls5 last	27750808.0 Ops/sec
classList attr5_cls5 last	26105566.0 Ops/sec
hasAttribute attr6_cls6 last	35795640.0 Ops/sec
classList attr6_cls6 last	31322912.0 Ops/sec
hasAttribute attr7_cls7 last	27925598.0 Ops/sec
classList attr7_cls7 last	25387124.0 Ops/sec
hasAttribute attr8_cls8 last	27747278.0 Ops/sec
classList attr8_cls8 last	24074662.0 Ops/sec
hasAttribute attr9_cls9 last	35405540.0 Ops/sec
classList attr9_cls9 last	31008758.0 Ops/sec
hasAttribute attr10_cls10 last	27863298.0 Ops/sec
classList attr10_cls10 last	25830404.0 Ops/sec
hasAttribute attr11_cls11 last	35298624.0 Ops/sec
classList attr11_cls11 last	30613394.0 Ops/sec
hasAttribute attr12_cls12 last	27894538.0 Ops/sec
classList attr12_cls12 last	25937322.0 Ops/sec
hasAttribute attr13_cls13 last	34731308.0 Ops/sec
classList attr13_cls13 last	29818994.0 Ops/sec
hasAttribute attr14_cls14 last	26755502.0 Ops/sec
classList attr14_cls14 last	25363096.0 Ops/sec
hasAttribute attr15_cls15 last	26524208.0 Ops/sec
classList attr15_cls15 last	25346686.0 Ops/sec
hasAttribute attr16_cls16 last	27401652.0 Ops/sec
classList attr16_cls16 last	25362172.0 Ops/sec
hasAttribute attr17_cls17 last	27385754.0 Ops/sec
classList attr17_cls17 last	25247076.0 Ops/sec
hasAttribute attr18_cls18 last	33871832.0 Ops/sec
classList attr18_cls18 last	29506828.0 Ops/sec
hasAttribute attr19_cls19 last	33510838.0 Ops/sec
classList attr19_cls19 last	27925926.0 Ops/sec
hasAttribute attr20_cls20 last	32891114.0 Ops/sec
classList attr20_cls20 last	28077466.0 Ops/sec

HTML Preparation code:

<div id="attr2_cls2" class="bar baz"></div>
<div id="attr3_cls3" class="bar baz a" a="a"></div>
<div id="attr4_cls4" class="bar baz a b" a="a" b="b"></div>
<div id="attr5_cls5" class="bar baz a b c" a="a" b="b" c="c"></div>
<div id="attr6_cls6" class="bar baz a b c d" a="a" b="b" c="c" d="d"></div>
<div id="attr7_cls7" class="bar baz a b c d e" a="a" b="b" c="c" d="d" e="e"></div>
<div id="attr8_cls8" class="bar baz a b c d e f" a="a" b="b" c="c" d="d" e="e" f="f"></div>
<div id="attr9_cls9" class="bar baz a b c d e f g" a="a" b="b" c="c" d="d" e="e" f="f" g="g"></div>
<div id="attr10_cls10" class="bar baz a b c d e f g h" a="a" b="b" c="c" d="d" e="e" f="f" g="g" h="h"></div>
<div id="attr11_cls11" class="bar baz a b c d e f g h i" a="a" b="b" c="c" d="d" e="e" f="f" g="g" h="h" i="i"></div>
<div id="attr12_cls12" class="bar baz a b c d e f g h i j" a="a" b="b" c="c" d="d" e="e" f="f" g="g" h="h" i="i" j="j"></div>
<div id="attr13_cls13" class="bar baz a b c d e f g h i j k" a="a" b="b" c="c" d="d" e="e" f="f" g="g" h="h" i="i" j="j" k="k"></div>
<div id="attr14_cls14" class="bar baz a b c d e f g h i j k l" a="a" b="b" c="c" d="d" e="e" f="f" g="g" h="h" i="i" j="j" k="k" l="l"></div>
<div id="attr15_cls15" class="bar baz a b c d e f g h i j k l m" a="a" b="b" c="c" d="d" e="e" f="f" g="g" h="h" i="i" j="j" k="k" l="l" m="m"></div>
<div id="attr16_cls16" class="bar baz a b c d e f g h i j k l m n" a="a" b="b" c="c" d="d" e="e" f="f" g="g" h="h" i="i" j="j" k="k" l="l" m="m" n="n"></div>
<div id="attr17_cls17" class="bar baz a b c d e f g h i j k l m n o" a="a" b="b" c="c" d="d" e="e" f="f" g="g" h="h" i="i" j="j" k="k" l="l" m="m" n="n" o="o"></div>
<div id="attr18_cls18" class="bar baz a b c d e f g h i j k l m n o p" a="a" b="b" c="c" d="d" e="e" f="f" g="g" h="h" i="i" j="j" k="k" l="l" m="m" n="n" o="o" p="p"></div>
<div id="attr19_cls19" class="bar baz a b c d e f g h i j k l m n o p q" a="a" b="b" c="c" d="d" e="e" f="f" g="g" h="h" i="i" j="j" k="k" l="l" m="m" n="n" o="o" p="p" q="q"></div>
<div id="attr20_cls20" class="bar baz a b c d e f g h i j k l m n o p q r" a="a" b="b" c="c" d="d" e="e" f="f" g="g" h="h" i="i" j="j" k="k" l="l" m="m" n="n" o="o" p="p" q="q" r="r"></div>

Script Preparation code:

const attr2_cls2 = document.getElementById("attr2_cls2");
const attr3_cls3 = document.getElementById("attr3_cls3");
const attr4_cls4 = document.getElementById("attr4_cls4");
const attr5_cls5 = document.getElementById("attr5_cls5");
const attr6_cls6 = document.getElementById("attr6_cls6");
const attr7_cls7 = document.getElementById("attr7_cls7");
const attr8_cls8 = document.getElementById("attr8_cls8");
const attr9_cls9 = document.getElementById("attr9_cls9");
const attr10_cls10 = document.getElementById("attr10_cls10");
const attr11_cls11 = document.getElementById("attr11_cls11");
const attr12_cls12 = document.getElementById("attr12_cls12");
const attr13_cls13 = document.getElementById("attr13_cls13");
const attr14_cls14 = document.getElementById("attr14_cls14");
const attr15_cls15 = document.getElementById("attr15_cls15");
const attr16_cls16 = document.getElementById("attr16_cls16");
const attr17_cls17 = document.getElementById("attr17_cls17");
const attr18_cls18 = document.getElementById("attr18_cls18");
const attr19_cls19 = document.getElementById("attr19_cls19");
const attr20_cls20 = document.getElementById("attr20_cls20");

Tests:

hasAttribute attr2_cls2 first
attr2_cls2.hasAttribute("id");
classList attr2_cls2 first
attr2_cls2.classList.contains("bar");
hasAttribute attr3_cls3 first
attr3_cls3.hasAttribute("id");
classList attr3_cls3 first
attr3_cls3.classList.contains("bar");
hasAttribute attr4_cls4 first
attr4_cls4.hasAttribute("id");
classList attr4_cls4 first
attr4_cls4.classList.contains("bar");
hasAttribute attr5_cls5 first
attr5_cls5.hasAttribute("id");
classList attr5_cls5 first
attr5_cls5.classList.contains("bar");
hasAttribute attr6_cls6 first
attr6_cls6.hasAttribute("id");
classList attr6_cls6 first
attr6_cls6.classList.contains("bar");
hasAttribute attr7_cls7 first
attr7_cls7.hasAttribute("id");
classList attr7_cls7 first
attr7_cls7.classList.contains("bar");
hasAttribute attr8_cls8 first
attr8_cls8.hasAttribute("id");
classList attr8_cls8 first
attr8_cls8.classList.contains("bar");
hasAttribute attr9_cls9 first
attr9_cls9.hasAttribute("id");
classList attr9_cls9 first
attr9_cls9.classList.contains("bar");
hasAttribute attr10_cls10 first
attr10_cls10.hasAttribute("id");
classList attr10_cls10 first
attr10_cls10.classList.contains("bar");
hasAttribute attr11_cls11 first
attr11_cls11.hasAttribute("id");
classList attr11_cls11 first
attr11_cls11.classList.contains("bar");
hasAttribute attr12_cls12 first
attr12_cls12.hasAttribute("id");
classList attr12_cls12 first
attr12_cls12.classList.contains("bar");
hasAttribute attr13_cls13 first
attr13_cls13.hasAttribute("id");
classList attr13_cls13 first
attr13_cls13.classList.contains("bar");
hasAttribute attr14_cls14 first
attr14_cls14.hasAttribute("id");
classList attr14_cls14 first
attr14_cls14.classList.contains("bar");
hasAttribute attr15_cls15 first
attr15_cls15.hasAttribute("id");
classList attr15_cls15 first
attr15_cls15.classList.contains("bar");
hasAttribute attr16_cls16 first
attr16_cls16.hasAttribute("id");
classList attr16_cls16 first
attr16_cls16.classList.contains("bar");
hasAttribute attr17_cls17 first
attr17_cls17.hasAttribute("id");
classList attr17_cls17 first
attr17_cls17.classList.contains("bar");
hasAttribute attr18_cls18 first
attr18_cls18.hasAttribute("id");
classList attr18_cls18 first
attr18_cls18.classList.contains("bar");
hasAttribute attr19_cls19 first
attr19_cls19.hasAttribute("id");
classList attr19_cls19 first
attr19_cls19.classList.contains("bar");
hasAttribute attr20_cls20 first
attr20_cls20.hasAttribute("id");
classList attr20_cls20 first
attr20_cls20.classList.contains("bar");
hasAttribute attr2_cls2 last
attr3_cls3.hasAttribute("class");
classList attr2_cls2 last
attr3_cls3.classList.contains("baz");
hasAttribute attr3_cls3 last
attr3_cls3.hasAttribute("a");
classList attr3_cls3 last
attr3_cls3.classList.contains("a");
hasAttribute attr4_cls4 last
attr4_cls4.hasAttribute("b");
classList attr4_cls4 last
attr4_cls4.classList.contains("b");
hasAttribute attr5_cls5 last
attr5_cls5.hasAttribute("c");
classList attr5_cls5 last
attr5_cls5.classList.contains("c");
hasAttribute attr6_cls6 last
attr6_cls6.hasAttribute("d");
classList attr6_cls6 last
attr6_cls6.classList.contains("d");
hasAttribute attr7_cls7 last
attr7_cls7.hasAttribute("e");
classList attr7_cls7 last
attr7_cls7.classList.contains("e");
hasAttribute attr8_cls8 last
attr8_cls8.hasAttribute("f");
classList attr8_cls8 last
attr8_cls8.classList.contains("f");
hasAttribute attr9_cls9 last
attr9_cls9.hasAttribute("g");
classList attr9_cls9 last
attr9_cls9.classList.contains("g");
hasAttribute attr10_cls10 last
attr10_cls10.hasAttribute("h");
classList attr10_cls10 last
attr10_cls10.classList.contains("h");
hasAttribute attr11_cls11 last
attr11_cls11.hasAttribute("i");
classList attr11_cls11 last
attr11_cls11.classList.contains("i");
hasAttribute attr12_cls12 last
attr12_cls12.hasAttribute("j");
classList attr12_cls12 last
attr12_cls12.classList.contains("j");
hasAttribute attr13_cls13 last
attr13_cls13.hasAttribute("k");
classList attr13_cls13 last
attr13_cls13.classList.contains("k");
hasAttribute attr14_cls14 last
attr14_cls14.hasAttribute("l");
classList attr14_cls14 last
attr14_cls14.classList.contains("l");
hasAttribute attr15_cls15 last
attr15_cls15.hasAttribute("m");
classList attr15_cls15 last
attr15_cls15.classList.contains("m");
hasAttribute attr16_cls16 last
attr16_cls16.hasAttribute("n");
classList attr16_cls16 last
attr16_cls16.classList.contains("n");
hasAttribute attr17_cls17 last
attr17_cls17.hasAttribute("o");
classList attr17_cls17 last
attr17_cls17.classList.contains("o");
hasAttribute attr18_cls18 last
attr18_cls18.hasAttribute("p");
classList attr18_cls18 last
attr18_cls18.classList.contains("p");
hasAttribute attr19_cls19 last
attr19_cls19.hasAttribute("q");
classList attr19_cls19 last
attr19_cls19.classList.contains("q");
hasAttribute attr20_cls20 last
attr20_cls20.hasAttribute("r");
classList attr20_cls20 last
attr20_cls20.classList.contains("r");

Run results for: classList.contains vs. hasAttribute v2

hasAttribute attr2_cls2 first

classList attr2_cls2 first

hasAttribute attr3_cls3 first

classList attr3_cls3 first

hasAttribute attr4_cls4 first

classList attr4_cls4 first

hasAttribute attr5_cls5 first

classList attr5_cls5 first

hasAttribute attr6_cls6 first

classList attr6_cls6 first

hasAttribute attr7_cls7 first

classList attr7_cls7 first

hasAttribute attr8_cls8 first

classList attr8_cls8 first

hasAttribute attr9_cls9 first

classList attr9_cls9 first

hasAttribute attr10_cls10 first

classList attr10_cls10 first

hasAttribute attr11_cls11 first

classList attr11_cls11 first

hasAttribute attr12_cls12 first

classList attr12_cls12 first

hasAttribute attr13_cls13 first

classList attr13_cls13 first

hasAttribute attr14_cls14 first

classList attr14_cls14 first

hasAttribute attr15_cls15 first

classList attr15_cls15 first

hasAttribute attr16_cls16 first

classList attr16_cls16 first

hasAttribute attr17_cls17 first

classList attr17_cls17 first

hasAttribute attr18_cls18 first

classList attr18_cls18 first

hasAttribute attr19_cls19 first

classList attr19_cls19 first

hasAttribute attr20_cls20 first

classList attr20_cls20 first

hasAttribute attr2_cls2 last

classList attr2_cls2 last

hasAttribute attr3_cls3 last

classList attr3_cls3 last

hasAttribute attr4_cls4 last

classList attr4_cls4 last

hasAttribute attr5_cls5 last

classList attr5_cls5 last

hasAttribute attr6_cls6 last

classList attr6_cls6 last

hasAttribute attr7_cls7 last

classList attr7_cls7 last

hasAttribute attr8_cls8 last

classList attr8_cls8 last

hasAttribute attr9_cls9 last

classList attr9_cls9 last

hasAttribute attr10_cls10 last

classList attr10_cls10 last

hasAttribute attr11_cls11 last

classList attr11_cls11 last

hasAttribute attr12_cls12 last

classList attr12_cls12 last

hasAttribute attr13_cls13 last

classList attr13_cls13 last

hasAttribute attr14_cls14 last

classList attr14_cls14 last

hasAttribute attr15_cls15 last

classList attr15_cls15 last

hasAttribute attr16_cls16 last

classList attr16_cls16 last

hasAttribute attr17_cls17 last

classList attr17_cls17 last

hasAttribute attr18_cls18 last

classList attr18_cls18 last

hasAttribute attr19_cls19 last

classList attr19_cls19 last

hasAttribute attr20_cls20 last

classList attr20_cls20 last