Why PERF RMANCE Matters? DENYS MISHUNOV · Digital Garden AS · @mishunov

Conversions 1 SECOND PERFORMANCE IMPROVEMENT http://goo.gl/E030E 2

  • %

Conversions 1 SECOND PERFORMANCE IMPROVEMENT http://goo.gl/E030E $482.2 billion

Conversions 1 SECOND DROP in PERFORMANCE http://goo.gl/JE1gD5

4,6 %

Conversions 2 SECONDS DROP in PERFORMANCE http://goo.gl/JE1gD5

5 %

Conversions 3 SECONDS DROP in PERFORMANCE http://goo.gl/JE1gD5

7,9 %

http://goo.gl/JnXZ2x

33.3 million uniques http://goo.gl/JnXZ2x

112.6 million views http://goo.gl/JnXZ2x

PERF RMANCE is not MATHEMATICS

PERF RMANCE is PERCEPTION

https://www.youtube.com/watch?v=d5_6yHixpsQ

WEBER-FECHNER LAW JND (just noticeable difference)

20% RULE EVENT

20% RULE EVENT 20%

NOTICEABLE = != MEANINGFUL

Duis autem vel eum iriure dolor in hendrerit in vulputate velit esse molestie consequat, vel illum dolore eu feugiat nulla facilisis at vero eros et accumsan et iusto odio.

Duis autem vel eum iriure dolor in hendrerit in vulputate velit esse molestie consequat, vel illum dolore eu feugiat nulla facilisis at vero eros et accumsan et iusto odio.

ACTIVE Boy, am I busy! PASSIVE

ACTIVE Boy, am I busy! PASSIVE

PREEMPTIVE START ПРОЦЕСС EVENT EVENT ACTIVE PHASE EVENT

PRELOAD TOP HITS mobile Safari Settings / Safari / Preload Top Hits

EARLY COMPLETION ПРОЦЕСС EVENT EVENT EVENT ACTIVE PHASE

PASSIVE PHASE

PASSIVE PHASE

ACTIVE PHASE

goo.gl/JnXZ2x

goo.gl/JnXZ2x

PASSIVE PHASE goo.gl/JnXZ2x ACTIVE PHASE

compress

async compress

workers

“ The perception of performance is just as effective as actual performance in many cases ”

THANK YOU DENYS MISHUNOV · Digital Garden AS · @mishunov