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Android performance 3: iPhone comparison

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The internet is just incredible. Within 30 minutes of logging onto the #iphonedev IRC channel on freenode, I got timing results for the iPhone on the simple loop benchmark from my last post. Thanks to ‘august’ for the help.

Here’s the benchmark converted into objective-C:


NSDate *start = [NSDate date];
int arr[8*320*480];
for(int i = 0; i < (8*320*480); i++)
arr[i] = i;
NSDate *end = [NSDate date];
NSLog(@"%g", [end timeIntervalSinceDate:start]);

Results:

  • iPhone (2.1 firmware, Objective-C): 9.5 milliseconds

And, from last time:

  • G1 (R29 firmware): 922 milliseconds.
  • G1 (R29 firmware): Loop only. 520 milliseconds.

Conclusions:

Objective-C kills the Java implementation on Android.  It’s almost exactly 100 times faster.  Note that I’m unsure if the memory allocation is included in the timing, so a more conservative statement is that Objective-C can run a tight loop 50 times faster than the Dalvik JVM.  It’s also true that real applications aren’t full of tight loops, and a real Android application won’t be 50 times slower than an iPhone counterpart.  Nevertheless, all else being equal, it will be slower, and potentially a lot slower.

For now, we’re sadly going to put our Android development on hold and switch to iPhone, and keep an eye out for performance improvements.

Written by jeff

November 2nd, 2008 at 2:13 pm

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