YAJLObjC vs JSON Framework Performance Test.m

#import "YAJL.h" // YAJL ObjC
#import "NSString+SBJSON.h" // JSON Framework

// JSON Data: Twitter Home Timeline (count=200)
// iPod touch 3rd Gen -> test0:296ms test1:323ms test2:170ms test3:488ms

@implementation Test

- (void)test0:(NSData*)JSONData {
	double st = CFAbsoluteTimeGetCurrent();
	[JSONData yajl_JSON];
	NSLog(@"test0: %.0fms", (CFAbsoluteTimeGetCurrent() - st)*1000.0);
}

- (void)test1:(NSData*)JSONData {
	double st = CFAbsoluteTimeGetCurrent();
	NSError *error = nil;
	YAJLDocument *document = [[YAJLDocument alloc] initWithData:JSONData 
												  parserOptions:0 error:&error];
	document.root;
	[document release];
	NSLog(@"test1: %.0fms", (CFAbsoluteTimeGetCurrent() - st)*1000.0);
}

- (void)test2:(NSData*)JSONData {
	double st = CFAbsoluteTimeGetCurrent();
	YAJLParser *parser = [[YAJLParser alloc] initWithParserOptions:0];
	parser.delegate = self;
	[parser parse:JSONData];
	if (parser.parserError) {
		NSLog(@"Error:\n%@", parser.parserError);
	}
	parser.delegate = nil;
	[parser release];
	NSLog(@"test2: %.0fms", (CFAbsoluteTimeGetCurrent() - st)*1000.0);
}

- (void)test3:(NSData*)JSONData {
	NSString *json = [[[NSString alloc] initWithData:JSONData
											encoding:NSUTF8StringEncoding] autorelease];
	double st = CFAbsoluteTimeGetCurrent();
	[json JSONValue];
	NSLog(@"test3: %.0fms", (CFAbsoluteTimeGetCurrent() - st)*1000.0);
}

- (void)allTest {
	NSString *path = [[NSBundle mainBundle] pathForResource:@"timeline200"
													 ofType:@"json"];
	NSData *JSONData = [NSData dataWithContentsOfFile:path];
	
	NSAutoreleasePool *pool;
	
	pool = [[NSAutoreleasePool alloc] init];
	[self test0:JSONData];
	[pool release];
	
	pool = [[NSAutoreleasePool alloc] init];
	[self test1:JSONData];
	[pool release];
	
	pool = [[NSAutoreleasePool alloc] init];
	[self test2:JSONData];
	[pool release];
	
	pool = [[NSAutoreleasePool alloc] init];
	[self test3:JSONData];
	[pool release];

	[self performSelector:@selector(allTest)
			   withObject:nil
			   afterDelay:3.0];
}

#pragma mark YAJLParserDelegate

- (void)parserDidStartDictionary:(YAJLParser *)parser {
}

- (void)parserDidEndDictionary:(YAJLParser *)parser {
}

- (void)parserDidStartArray:(YAJLParser *)parser {
}

- (void)parserDidEndArray:(YAJLParser *)parser {
}

- (void)parser:(YAJLParser *)parser didMapKey:(NSString *)key {
}

- (void)parser:(YAJLParser *)parser didAdd:(id)value {
}

@end