Run results for: Trig functions

Run details:

User agent: Mozilla/5.0 (iPhone; CPU iPhone OS 13_6_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/13.1.2 Mobile/15E148 Safari/604.1

Browser: Mobile Safari 13

Operating system: iOS 13.6.1

Device Platform: Mobile

Date tested: 3 years ago

Test name	Executions per second
sin	5.8 Ops/sec
cos	5.8 Ops/sec
tan	5.8 Ops/sec
asin	5.8 Ops/sec
acos	5.8 Ops/sec
atan	5.8 Ops/sec
atan2	3.8 Ops/sec

Script Preparation code:

var N = 1000000;
var x = new Float32Array(N);
var y = new Float32Array(N);
var theta = new Float32Array(N);

for (var i = 0; i < N; ++i) {
	x[i] = 100* Math.random();
	y[i] = 100* Math.random();
}
for (var i = 0; i < N; ++i) {
	theta[i] = 2 * Math.PI * Math.random();
}

Tests:

sin
var fn = Math.sin; for (var i = 0; i < N; ++i) { fn(theta[i]); }
cos
var fn = Math.cos; for (var i = 0; i < N; ++i) { fn(theta[i]); }
tan
var fn = Math.tan; for (var i = 0; i < N; ++i) { fn(theta[i]); }
asin
var fn = Math.asin; for (var i = 0; i < N; ++i) { fn(x[i]); }
acos
var fn = Math.acos; for (var i = 0; i < N; ++i) { fn(x[i]); }
atan
var fn = Math.atan; for (var i = 0; i < N; ++i) { fn(x[i]); }
atan2
var fn = Math.atan; for (var i = 0; i < N; ++i) { fn(x[i], y[i]); }

Run results for: Trig functions

Which of the built-in trig functions are fastest? slowest?

sin

cos

tan

asin

acos

atan

atan2