iOSでDebugの時だけの時間計測クラス

2017/04/28
今更だけど肝心のNSLogで出力を最後に入れ忘れてた...

重たい処理を高速化する時の目安程度に作ってみた

時間計測クラス

Measure.h

# import <Foundation/Foundation.h>

# ifdef DEBUG

//デバッグ時だけ計測
# define MEASURE_START [Measure measureMethod:^{
# define MEASURE_END_M(message) } withMessage:(message)];
# define MEASURE_END }];
# else

# define MEASURE_START
# define MEASURE_END_M(message)
# define MEASURE_END

# endif


typedef void (^measureBlock)();

@interface Measure : NSObject
+(void)measureMethod:(measureBlock)block;
+(void)measureMethod:(measureBlock)block withMessage:(NSString *)message;
@end

Measure.m

# import "Measure.h"

@implementation Measure
+(void)measureMethod:(measureBlock)block{
[Measure measureMethod:block withMessage:nil];
}

+(void)measureMethod:(measureBlock)block withMessage:(NSString *)message{
  NSDate *start = [NSDate date];
  block();
  NSTimeInterval time = -[start timeIntervalSinceNow];
  NSString *log = [NSString stringWithFormat:@"process time = %lf", time];
  if (message) {
    log = [NSString stringWithFormat:@"%@ process time = %lf", message, time];
  }
  NSLog(@"%@", log);
}
@end

使い方

howToUse.m

# import "Measure.h"
.
.
.

//メッセージをつけない場合
MEASURE_START
[self hogehoge1];
MEASURE_END

//戻り値がない場合
MEASURE_START
[self hogehoge1];
MEASURE_END_M(@"[hogehoge1]")

//戻り値がある場合   __blockがいるよ
__block UIImage *hogeImg = nil;
MEASURE_START
hogeImg =[self hogehoge2];
MEASURE_END_M(@"[hogehoge2]")

.
.
.

出力

process time = 0.065342
[hogehoge1] process time = 0.065342
[hogehoge2] process time = 0.12345