Pinterest: Upgrading Java Operational Metrics

optimization.java

// Unoptimized
// this performs a synchronized lookup for every increment
void someHighQPSFunction() {
    Stats.incr("metric_name");
}

// Optimized
Counter someCounter = Stats.counter("metric_name");
void someHighQPSFunction() {
    someCounter.incr(); // saves one synchronized lookup per increment
}