navigator.hardwareConcurrency

Returns the number of logical cores of the user's CPU. The value may be reduced to prevent device fingerprinting or because it exceeds the allowed number of simultaneous web workers.

WHATWG Living Standard: https://html.spec.whatwg.org/multipage/workers.html#navigator.hardwareconcurrency

Usage: 95.4% + 0% = 95.4%

Support summary

Notes

  1. WebKit browsers clamp the maximum value returned to 2 on iOS devices and 8 on all others. Disabled in Safari behind the ENABLE_NAVIGATOR_HWCONCURRENCY build option.
  2. Safari clamps this property to 4 or 8 cores, to prevent device fingerprinting.

Links

Full support table

IE

5.567891011
nnnnnnn

Edge

121314151617187980818384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137
nnnyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyy

Firefox

233.53.6456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142
nnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyy

Chrome

4567891011121314151617181920212223242526272829303132333435363738394041424344454647484950515253545556575859606162636465666768697071727374757677787980818384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140
nnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyy

Safari

3.13.2455.166.177.1899.11010.11111.11212.11313.11414.11515.115.2-15.315.415.515.616.016.116.216.316.416.516.617.017.117.217.317.417.517.618.018.118.218.318.418.5TP
nnnnnnnnnn,dn,dn,dn,dynnnnnnnnnnnyyyyyyyyyyyyyyyyyyyyyyyy

Opera

99.5-9.610.0-10.110.510.61111.111.511.61212.11516171819202122232425262728293031323334353637383940414243444546474849505152535455565758606263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117
nnnnnnnnnnnnnnnnnnnnyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyy

Safari on iOS

3.24.0-4.14.2-4.35.0-5.16.0-6.17.0-7.188.1-8.49.0-9.29.310.0-10.210.311.0-11.211.3-11.412.0-12.112.2-12.513.0-13.113.213.313.4-13.714.0-14.414.5-14.815.0-15.115.2-15.315.415.515.6-15.816.016.116.216.316.416.516.6-16.717.017.117.217.317.417.517.6-17.718.018.118.218.318.418.5
nnnnnnn,dn,dn,dn,dn,dynnnnnnnnnnnnyyyyyyyyyyyyyyyyyyyyyyy

Opera Mini

all
n

Android Browser

2.12.22.3344.14.2-4.34.44.4.3-4.4.4137
nnnnnnnnny

Blackberry Browser

710
nn

Opera Mobile

101111.111.51212.180
nnnnnny

Chrome for Android

137
y

Firefox for Android

139
y

IE Mobile

1011
nn

UC Browser for Android

15.5
y

Samsung Internet

45.0-5.46.2-6.47.2-7.48.29.210.111.1-11.212.013.014.015.016.017.018.019.0202122232425262728
yyyyyyyyyyyyyyyyyyyyyyyyy

QQ Browser

14.9
y

Baidu Browser

13.52
y

KaiOS Browser

2.53.0-3.1
yy

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