NewPipe/app
Redirion d8b80f961a
Improved performance of getTimeString
This pull requests complements pull request  #2178 by reducing general computational time for the method getTimeString.

On my local machine (Desktop PC with Java) my tests with a sample size of 10000 calls to the method with param 86400001 showed a performance improvement of about 50%.

See sample code below to reproduce:

    private static final StringBuilder stringBuilder = new StringBuilder();
    private static final Formatter stringFormatter = new Formatter(stringBuilder, Locale.getDefault());
    
    public static String getTimeString(int milliSeconds) {
        int seconds = (milliSeconds % 60000) / 1000;
        int minutes = (milliSeconds % 3600000) / 60000;
        int hours = (milliSeconds % 86400000) / 3600000;
        int days = (milliSeconds % (86400000 * 7)) / 86400000;

        stringBuilder.setLength(0);
        return days > 0 ? stringFormatter.format("%d:%02d:%02d:%02d", days, hours, minutes, seconds).toString()
                : hours > 0 ? stringFormatter.format("%d:%02d:%02d", hours, minutes, seconds).toString()
                : stringFormatter.format("%02d:%02d", minutes, seconds).toString();
    }
    
    public static String getTimeStringL(int milliSeconds) {
        long seconds = (milliSeconds % 60000L) / 1000L;
        long minutes = (milliSeconds % 3600000L) / 60000L;
        long hours = (milliSeconds % 86400000L) / 3600000L;
        long days = (milliSeconds % (86400000L * 7L)) / 86400000L;

        stringBuilder.setLength(0);
        return days > 0 ? stringFormatter.format("%d:%02d:%02d:%02d", days, hours, minutes, seconds).toString()
                : hours > 0 ? stringFormatter.format("%d:%02d:%02d", hours, minutes, seconds).toString()
                : stringFormatter.format("%02d:%02d", minutes, seconds).toString();
    }
    
	public static void main(String[] args) throws Exception {
		final int SAMPLE_SIZE = 25000;
		long[] results = new long[SAMPLE_SIZE];
		for(int i = 0; i < SAMPLE_SIZE; i++) {
			long now = System.nanoTime();
			getTimeString(86400001);
			results[i] = System.nanoTime() - now;
		}
		long sum = 0;
		for(int i = 0; i < SAMPLE_SIZE; i++) {
			sum += results[i];
		}
		System.out.println("Average execution time: " + (sum/SAMPLE_SIZE));
		results = new long[SAMPLE_SIZE];
		for(int i = 0; i < SAMPLE_SIZE; i++) {
			long now = System.nanoTime();
			getTimeStringL(86400001);
			results[i] = System.nanoTime() - now;
		}
		sum = 0;
		for(int i = 0; i < SAMPLE_SIZE; i++) {
			sum += results[i];
		}
		System.out.println("Average execution time: " + (sum/SAMPLE_SIZE));
2019-03-04 15:45:59 +01:00
..
src Improved performance of getTimeString 2019-03-04 15:45:59 +01:00
.gitignore New version number 0.6.0 and some fixes: 2015-11-10 20:51:39 +01:00
build.gradle updated extractor 2019-03-03 04:34:50 +05:30
proguard-rules.pro Downloader: Fix crash on loading unfinished downloads from .giga files 2018-06-01 14:35:03 +02:00