2020-03-21-lighter-website.md (3127B) - raw

      1 <!-- title: A lighter website -->
2 <!-- slug: lighter-website -->
3 <!-- categories: Personal domain -->
4 <!-- date: 2020-03-21T00:00:00Z -->
5
6 Following up with the [last post][post], I decided to make my website even
7 faster (which probably doesn't make a difference anymore).
8
9 ## The logo
10
11 My pages (HTML only) were about 21KB (without compression), but 11KB of those
12 consisted of an SVG that appeared in all of them: the logo. The logo wasn't
13 requested from a different static file because I needed to modify it using CSS
14 (so that colors would change when switching to the dark theme) and, at the time,
15 I thought inlining was the only option to allow that. However, investigating a
16 little I found out there are alternatives to inlining: we can take advantage of
17 the use tag of SVGs to "inline" an SVG from a different URL. By using that, my
18 pages are now around 10KB of size (plus the statics files, which have a total
19 size of 37KB for the pages without MathJax).
20
21 ## The static files
22
23 Considering that the favicon.ico is already 15KB, 47KB for a page is very
24 good! Nevertheless, I wanted to reduce it even more[^fun]. I looked into browser
25 caching and liked the idea. I'll explain the basics. When our browser sends a
26 request for a certain resource (URL/file), the server that responds can add
27 information that tells the browser how long it should keep the file for. If the
28 next time you browse that site and need the file again the file hasn't
29 "expired", your browser will not request it, but instead make use of the copy
31 bandwidth used.
32
33 [^fun]: By now you have probably figured out this is more of a hobby than
34   something useful, as the size reduced is ridiculously small.
35
36 The only problem with browser caching is that if the contents of a certain file
37 change, your users will not see those until their copies expire. We want to
38 maximize the time a file is used for before requesting it again while minimizing
39 the time between update checks (unless our static files never change). To solve
40 that, I used [Hugo's Pipes][hp], which allows you to add the SHA256 sum of a
41 static file to its name automatically (and all the places where the file is
43 https://oscarbenedito.com/css/style.min.<SHA256>.css, which will (highly
44 probably) change when the contents change. Since the URL will be different, the
45 browser will request the new file.
46
47 ## The uncompressed SVGs
48
49 I found out that SVG files where not being compressed by default[^reason]. So I
50 also enabled that!
51
52 [^reason]: I don't really know the reason why. It might have something to do
53   with .svgz files. No idea.
54
55 ## Final comment
56
57 My webpage is ridiculously small and all these optimizations aren't that
58 important. However, it is fun to learn about all of this and it can also be
59 helpful if in the future I have a site with bigger static files (or someone