While instrumenting my app I found that CPU usage jumps to 90% when writing data to output stream. Specifically, when network speed is very high. When I profile it With Timer instrument, found that most of the cpu is used for NSStream delegate call. Please Help to optimize writing technic as to low down the cpu usage.
- (void)stream:(NSStream *)aStream handleEvent:(NSStreamEvent)eventCode
{
switch (eventCode) {
case NSStreamEventOpenCompleted: {
_isConnected = YES;
if([self.delegate respondsToSelector:@selector(isFTPConnectionFoundForUpload:)])
[self.delegate performSelector:@selector(isFTPConnectionFoundForUpload:) withObject:_isConnected?@"YES":@"NO"];
} break;
case NSStreamEventHasSpaceAvailable: {
bytesWritten = [self.producerStream write:&self.buffer[0] maxLength:512];
if (bytesWritten == -1) {
[self stopSendWithStatus:@"Network write error"];
}
} break;
case NSStreamEventErrorOccurred: {
NSLog(@"producer stream error %@", [aStream streamError]);
[self stopSendWithStatus:@"Stream open error"];
} break;
case NSStreamEventEndEncountered: {
} break;
default: {
} break;
}
}
