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@sandor-nemeth
sandor-nemeth / PropertyLogger.java
Last active April 23, 2024 13:50
Spring Boot - Log all configuration properties on application startup
package io.github.sandornemeth.spring;
import java.util.Arrays;
import java.util.stream.StreamSupport;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.context.event.ContextRefreshedEvent;
import org.springframework.context.event.EventListener;
import org.springframework.core.env.AbstractEnvironment;
@VincentMasselis
VincentMasselis / DateUtil.java
Last active May 31, 2021 09:49
Simple Java 7 RFC3339 parser (Android compatible)
/*
Inspired by http://cokere.com/RFC3339Date.txt
All rights deserve to Chad Okere
*/
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Locale;
import java.util.TimeZone;
@olange
olange / graphviz-build-system-for-sublime.md
Created January 4, 2015 00:21
Graphviz (DOT) Build System for Sublime Text 2 and 3

To transform the currently opened Graphviz source file (in DOT Language) into a PNG:

{
    "cmd": [ "dot", "-Tpng", "-o", "$file_base_name.png", "$file"],
    "selector": "source.dot"
}

Usage

@jboner
jboner / latency.txt
Last active May 21, 2024 07:18
Latency Numbers Every Programmer Should Know
Latency Comparison Numbers (~2012)
----------------------------------
L1 cache reference 0.5 ns
Branch mispredict 5 ns
L2 cache reference 7 ns 14x L1 cache
Mutex lock/unlock 25 ns
Main memory reference 100 ns 20x L2 cache, 200x L1 cache
Compress 1K bytes with Zippy 3,000 ns 3 us
Send 1K bytes over 1 Gbps network 10,000 ns 10 us
Read 4K randomly from SSD* 150,000 ns 150 us ~1GB/sec SSD