What causes frame spikes from loading assets at runtime?

Loading an asset (a prefab, texture, audio) the first time it is needed reads and processes it synchronously on the main thread, spiking the frame.

How do I catch this when it only happens for some players?

Capture it automatically from the player's device with the full stack trace, the device and OS, the build, and a breadcrumb trail of what they did. That turns a vague complaint into a specific, reproducible issue you can fix without owning the hardware it happens on.

How to Fix Frame Spikes from Loading Assets at Runtime

Quick answer: Preload assets during loading screens, load asynchronously in the background, and cache loaded assets so the first use does not pay the load cost.

Runtime asset-load spikes are synchronous first-use loading. Preloading fixes it. Here is how.

How to fix it

1. Preload during loading screens

Load the assets a section needs during its loading screen, so they are ready in memory before gameplay. The first-use load that spikes the frame is avoided because the asset is already loaded.

2. Load asynchronously

When you must load at runtime, use async loading so the work happens off the main thread, and show a placeholder until it is ready, rather than a synchronous load that blocks the frame.

3. Cache loaded assets

Cache assets after loading so subsequent uses reuse the in-memory copy instead of reloading. Repeatedly loading the same asset re-pays the cost; caching it pays once.

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.

The errors you never hear about are the ones quietly costing you players. Visibility turns them into a worklist.