CODEWITHSUNDEEP
iphoneios
Kyle
Kyle

Reputation: 22045

What is the iOS equivalent of Java's System.nanoTime()?

What is the iOS equivalent of Java's System.nanoTime()?

Basically I just want a simple way to see how many milliseconds (or fractions of ms) that a function takes to execute.

Upvotes: 3

Views: 1815

Answers (2)

sch
sch

Reputation: 27506

You are probably looking for CFAbsoluteTimeGetCurrent().

CFAbsoluteTime before = CFAbsoluteTimeGetCurrent();
// You code here
CFAbsoluteTime after = CFAbsoluteTimeGetCurrent();
NSLog(@"duration = %f", after - before);

Upvotes: 1

jsd
jsd

Reputation: 7693

Capture two NSDate objects, one at the start of your function and one at the end. Use timeIntervalSinceDate: to get an NSTimeInterval value back. This goes down to "sub-millisecond accuracy" according to the docs.

Upvotes: 0

Related Questions