diff --git a/fosdem-2025/Makefile b/fosdem-2025/Makefile
new file mode 100644
index 0000000..3ccd20c
--- /dev/null
+++ b/fosdem-2025/Makefile
@@ -0,0 +1,8 @@
+small:
+ dillo -g 1024x576 slides.html &
+
+big:
+ dillo -g 1280x720 slides.html &
+
+watch:
+ ls | entr pkill -SIGUSR1 dillo
diff --git a/fosdem-2025/css/gruvbox-dark.css b/fosdem-2025/css/gruvbox-dark.css
new file mode 100644
index 0000000..ccb5c15
--- /dev/null
+++ b/fosdem-2025/css/gruvbox-dark.css
@@ -0,0 +1,6 @@
+body { background: #282828; color: #ebdbb2; }
+pre { border-left: 5px solid #888; }
+div#end { background: #ffffea; }
+.hi { background: #98971a; color: #282828; }
+:link { color: #83a598; }
+:visited { color: #d3869b; }
diff --git a/fosdem-2025/css/gruvbox-light.css b/fosdem-2025/css/gruvbox-light.css
new file mode 100644
index 0000000..8afff33
--- /dev/null
+++ b/fosdem-2025/css/gruvbox-light.css
@@ -0,0 +1,22 @@
+body {
+ background: #fbf1c7;
+ color: #3c3836;
+}
+
+pre {
+ background: #eee;
+}
+
+.hi {
+ background: #ffff00;
+}
+
+div#title {
+ /*background: #ffffea;*/
+ background: #fbf1c7;
+ color: #3c3836;
+}
+
+div#end {
+ background: #ffffea;
+}
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diff --git a/fosdem-2025/index.html b/fosdem-2025/index.html
new file mode 100644
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--- /dev/null
+++ b/fosdem-2025/index.html
@@ -0,0 +1,340 @@
+
+
+
+ Resurrecting Dillo
+
+
+
+
+
+Resurrecting Dillo
+
25th year aniversary!
+
+
Rodrigo Arias Mallo
+
rodarima@gmail.com
+
2025-02-05
+
About me
+
+ - I'm a computer scientist at the Barcelona Supercomputer Center (HPC)
+ - I've been using Dillo for about 10 years on old computers
+ - I mostly program in C
+ - Simplicity is beautiful
+
+
What is Dillo?
+
+ - Dillo is a very lightweight graphical web browser
+ - Has its own rendering engine and uses FLTK for the UI
+ - Support for a reasonable subset of HTML and CSS
+ - Doesn't support Javascript
+ - 25 years old project, since 1999
+
+
What is Dillo?
+
+ - Dillo is a very lightweight graphical web browser
+ - Has its own rendering engine and uses FLTK for the UI
+ - Support for a reasonable subset of HTML and CSS
+ - Doesn't support Javascript
+ - 25 years old project, since 1999
+ - This presentation is shown in Dillo itself!
+
+
Objectives
+
+ - Lower the barrier of entry to the web (computational / network)
+
+ - User privacy (no cookies by default, no JS, no telemetry)
+ - Efficiency (fast and stream rendering, small codebase)
+ - Easy to use for users by default
+
+
Abandoned in 2017
+
+ - In 2016, rendering engine developer
+ █
+ Sebastian Geerken passed away
+ - In 2017, lead developer
+ █
+ Jorge Arellano Cid not active anymore
+ - In 2022, DNS lost and someone took over dillo.org to serve SPAM
+ - Gone: Email server, website, repo, mailing list, bug tracker
+ - Last official release 3.0.5 in 2015, some unreleased changes since then
+
+
+
Resurrection in 2024
+
+ - In early 2024 I decided to try to resurrect it
+ - Old content recovered and backed up on GitHub and archive.org
+ - Setup a GitHub organization and a new website:
+ https://dillo-browser.github.io
+ - New mailing list at dillo-dev@mailman3.com
+ - Donations at Liberapay
+ https://liberapay.com/dillo/
+ and IRC channel at libera: #dillo
+
+
+
Release 3.1.0 after 9 years!
+
+ - Automatic HTML rendering tests
+ - GitHub CI pipeline to build and pass the test suite
+ - Added support for OpenSSL/LibreSSL along with Mbed TLS
+ - Released version 3.1.0 with minimal changes
+ - Quickly adopted by several Linux/BSD distributions
+
+
+
Release 3.2.0 two weeks ago
+
+ - SVG support for Wikipedia math formulas, WebP too
+ - Scrollbar page navigation mode
+ - Open URLs with custom programs or commands
+ - Zoom control with
Ctrl +/-/0
+ - Reload the current page with SIGUSR1
+
+
+
+
Usage demo
+
+
+
Old netbook for testing
+
+ - Intel Atom N455 from 2010, the CPU is 15 years old!
+ - 1 core at 1.66 GHz with 2 HW threads (Hyper Threading)
+ - Very small cache: L1d 24 KiB / L1i 32 KiB / L2 512 KiB / L3 Nope
+ - RAM is 2 GiB with 4 GiB of SWAP
+ - Fast SSD as disk
+ - Bought second hand for 30 € + new SSD disk
+
+
Open link with external tools
+
+
Extensible with plugins
+
+
Examples of bloated websites
+
Anything that you find in the "modern" Web is broken or bloated, requiring
+you to run JavaScript to display mostly text websites:
+
+
Examples of simple websites
+
These websites work well with a subset of HTML and CSS and degrade nicely
+without JavaScript:
+
+ - Blogs/personal:
+ XXIIVV,
+ 100r.co,
+ Datagubbe,
+ idlewords.com,
+ Seirdy
+
+ - News/link agregators:
+ NPR (text),
+ LWN,
+ HN,
+ Lobste.rs
+
+ - Forums:
+ phpBB,
+ vBulletin,
+ Little
+ forum,
+
+ WordPress
+
+ -
+ Alternative frontends:
+ Invidious (YouTube),
+ Tent (Bandcamp),
+ Brutaldon (Mastodon)
+
- Search engines:
+ Wiby,
+ Mojeek,
+ DuckDuckGo (lite)...
+ (more at
+
+ Seirdy post)
+
+
+
+
Performance and complexity
+
+
+
+
+
Codebase complexity
+
+ - A large codebase is a barrier for patches.
+ - Dillo is very small compared with "big" browsers.
+ - Distributed in a single floppy disk!
+
+
+
+
+ | Browser | Version | SLOC (C/C++) | Tarball size |
|---|
+ | Dillo | 3.2.0 | 71k | 1.32 MiB |
+ | Netsurf | 3.11 | 412k | 8.66 MiB |
+ | Firefox | 134.0 | 11.4M | 576 MiB |
+ | Chromium | 134.0.6955.1 | 18.6M | 1157 MiB? |
+
+
+
+
Low barrier for compiling
+
+ - Apart from using the browser, it is also important to be able to hack it
+ - Two main constraints: build time and peak memory (RSS) required for linking
+ - Can be hacked with 15 year old machines in reasonable time
+
+
+
+
+ | Machine | CPU | Year | Jobs | Wall time¹ | Peak RSS |
|---|
+ | Toy | N455 | 2010 | 1 | 6 min 33 s | 131 MiB |
+ | Toy | N455 | 2010 | 2 | 5 min 20 s | 134 MiB |
+ | Hop | i7-10700F | 2020 | 1 | 31 s | 128 MiB |
+ | Hop | i7-10700F | 2020 | 8 | 8.5 s | 125 MiB |
+
+
+ ¹ Shows the wall clock time to rebuild the whole browser with
+ GCC, measured with GNU time(1) (not the builtin time command).
+
+
+
+
The end
+
+ - Remember that not everyone can get the latest computer or fast networks.
+ - But everyone should be able to read the content of the Web.
+ - Allow people to choose using newer technologies like JS or
+ fallback to plain HTML.
+
+ - Thanks for your attention!
+ - Questions? Some page you want to test?
+
+
