Slides from #PerfMatters Conference 2019 All too often developers ask the question, “Is my service or feature healthy?” When more importantly we should be asking the question, “Are my users happy?” Zillow developed a new convention shifting our culture so we can better relate empathy for our users. This new strategy integrates performance directly in our business metrics and drives priority to what matter most, our users. Come learn why we’ve made this shift, and how we’re measuring. Learn how we have enabled our developers and product managers to be accountable for performance and transparent with prioritization of performance against new and existing feature development. Nathan will share challenges observed and overcome as they’ve evolved too. Performance no longer takes a back seat during development. Call shotgun. You’re in for a ride.

2. https://marketingplatform.google.com/about/analytics/

8. https://www.youtube.com/watch?v=lJ8ydIuPFeU&feature=youtu.be

24. Reference Source

25. Tick “In” Counter

26. Tick “Out” Counter

27. Tick “Out” Counter

28. Total “OUTs” / Total “INs” = Success Rate

29. Tiered Turnstile
Quantify Each Experience Based on:
1. Did the experience happen successfully?
2. How long did it take?
Delighted
-latencyBound
-survivalRate
--Fast
Angry
- Too Slow
- Failures
Satisfied
-latencyBound
-survivalRate
--Fast Enough

30. List<TieredTurnstileBound> bounds = new LinkedList<>();
// Any data point not meeting the satisfied or delighted latency thresholds will automatically be placed in
the MISS or angry bucket.
bounds.add(new TieredTurnstileBound("Delighted", 0.8f, 100));
bounds.add(new TieredTurnstileBound("Satisfied", 0.95f, 200));
public void manuallyCount()
{ register.getTimer("my.timer").record(latency, TimeUnit.MILLISECONDS);
int startTime = {insert some way to time here};
ExampleTieredTurnstile tieredTurnstile = register.getTieredTurnstile("my.turnstile", bounds);
turnstile.incrementIn();
try{
// do some code.
int endTime = {insert some way to time here};
int latency = endTime - startTime;
turnstile.incrementOut(latency);
// Record the timer
register.getTimer("my.timer").record(latency, TimeUnit.MILLISECONDS);
}
finally{ // Turnstile Out should only be incremented on successful execution, therefore should NOT be
in the finally block.
}
}

36. Desktop (August 2018)
Some Desktop Page View Monthly Trend % MoM
Delighted views - within 3.5s 68% -2%
Satisfied views - within 10s 92% -1%
Angry views - errors or over 10s 8% 1%
Views 9,854,474
Mobile (August 2018)
Some Mobile Page View Monthly Trend % MoM
Delighted views - within 3.5s 51% -3%
Satisfied views - within 10s 81% -2%
Angry views - errors or over 10s 19% 2%
Views 7,617,302