Frontend

Replacing a per-symbol replaceAll loop with a single regex pass and a Map lookup cut mana symbol conversion time by 47×. The mechanism, the benchmark, and a gotcha with stateful regex.

Rendering Magic’s mana symbols as a custom webfont: why a font beats SVG sprites or images, how subsetting drops a 200–300 KB file to under 40 KB, and the tradeoffs around font loading that the obvious approach misses.

When you type t:cre, the search box completes it to t:Creature before any network request leaves your browser. The type list lives in a frozen in-memory index, populated once at page load from the Rust engine.

/?q=fire always returns fully rendered HTML — no JavaScript required. JS layers typeahead and live updates on top. The cost: two card renderers that have to stay in sync.