How to Speed Up Script Compilation in Unity

If one-line changes trigger a full recompile, your code is one giant assembly. Splitting it fixes iteration time. Here is how.

How to fix it

1. Introduce asmdefs

Add assembly definitions to partition code by feature so a change recompiles only the affected assembly.

2. Mind the dependencies

Keep the dependency graph shallow so editing a low-level assembly does not cascade into recompiling everything.

3. Separate editor code

Put editor-only code in its own assembly so it never recompiles during gameplay iteration.

Catching the ones you can't reproduce

The hardest version of this to fix is the one you can't reproduce — it only happens on a player's hardware, OS, driver, or save state, under conditions that simply aren't present on your machine. A report that says “it crashed” or “it froze” gives you nothing to act on, so the bug survives release after release while quietly costing you players.

Automatic error capture closes that gap. Each failure arrives with its full stack trace, the device and OS, the build number, and a breadcrumb trail of what the player did right before it broke, so even a failure you have never seen becomes a specific, reproducible issue. Fold identical failures into one signature ranked by how many players each hits, and your worklist sorts itself worst-first instead of arriving as a stream of vague complaints.

This is where a tool like Bugnet earns its place. Its SDK captures every error automatically with the full stack trace plus device, OS, memory, build, and game-state context, folds duplicates into one grouped issue with an occurrence count, and ties each to the build it first appeared on — so you fix the problem that hurts the most players first and confirm it is gone when its signature disappears from the next release.