Reducing code-size for web version

Currently even the minified version is a whopping 2.04 MB which is a rather heavy even when gzipped. Looking through the code, I noticed that Emscripten's canvas, SDL audio and requestAnimationFrame are included in the minified output, which are obviously not used by SQLite.

When compiling only for browser, ENVIRONMENT_IS_NODE and ENVIRONMENT_IS_SHELL would be false and could be dead-code eliminated. Also, the filesystem and TTY also takes out a substantial chunk of code which could be unnecessary. _sysconf is also ever called with 30 so it could be aggressively inlined.

I wonder if there are options to set which could reduce the code size?

Start by reviewing the browser compilation configuration and how Emscripten includes canvas, SDL audio, requestAnimationFrame, filesystem, TTY, and _sysconf in the minified output. Determine which compilation options can exclude unused code, then verify that the browser build remains functional with a reduced minified size.