DailyRNG

Web Performance

Web Performance

Every lesson in order, step by step. No difficulty tiers. Just follow the arrows.

15 lessons, about 19 min of reading

1

What is actually slow →

Step 1 · Basic

2

Request count versus file size →

Step 2 · Basic

3

Cache headers and the token →

Step 3 · Basic

4

Images: size, format, and dimensions →

Step 4 · Basic

5

Fonts and the text that shifts →

Step 5 · Basic

6

Scripts: defer, async, or move →

Step 6 · Basic

7

Reading the numbers you collected →

Step 7 · Basic

8

The network path: connections and negotiation →

Step 8 · Advanced

9

The critical path and what to inline →

Step 9 · Advanced

10

Deferring work that is not needed yet →

Step 10 · Advanced

11

Compression, minification, and what not to compress →

Step 11 · Advanced

12

A budget that a person can act on →

Step 12 · Advanced

13

Attributing a regression to one owner →

Step 13 · Master

14

Guarding against a regression after the fix →

Step 14 · Master

15

Shipping the performance change safely →

Step 15 · Master