What's the difference between a memory leak and a memory spike?

A memory leak is memory allocated and never freed, so it grows steadily and unbounded over time, the longer you play, the more memory is used, until it slows or crashes. A memory spike is a sudden, often temporary jump in memory at a specific moment (loading a big level, spawning many objects). A leak worsens continuously over a session; a spike is a momentary surge. They have different patterns and different fixes.

How do I tell if I have a memory leak or a memory spike?

Look at the pattern over a session. A leak shows steady, continuous growth, memory climbing the longer the game runs, only manifesting in longer sessions. A spike shows a sharp, sudden jump at a specific event (a level load, a big spawn), often coming back down afterward. Capturing memory behavior over real sessions reveals which: gradual unbounded growth means a leak, a momentary surge tied to an event means a spike.

Do memory leaks and spikes need different fixes?

Yes. A leak is fixed by finding what accumulates and releasing it, freeing objects, unsubscribing event handlers, bounding caches, so memory holds steady over time. A spike is fixed by reducing the peak, streaming loads instead of loading everything at once, spreading allocations across frames, so the momentary surge stays within the device's limits. Mistaking one for the other means applying the wrong fix, so diagnose the pattern first.

Memory Leak vs Memory Spike: What's the Difference?

Quick answer: A memory leak is memory that grows steadily over time because it's allocated and never freed; a memory spike is a sudden, often temporary jump in memory use. A leak worsens over time; a spike is momentary.

Memory leaks and memory spikes are both memory problems that can cause out-of-memory crashes, but they behave differently and have different causes. Telling them apart guides your fix. Here's the difference.

What a Memory Leak Is

A memory leak is memory that's allocated and never freed, so it accumulates steadily over time. The defining pattern is gradual, unbounded growth: the longer the game runs, the more memory it uses, until it slows down or crashes with an out-of-memory error. A leak's growth is continuous and only manifests in longer sessions.

Leaks come from things never released, objects added to a collection and never removed, handlers never unsubscribed, caches that only grow. Bugnet captures memory-related crashes over real sessions, so the long-session out-of-memory crashes a leak causes surface in your data even though quick tests miss them.

What a Memory Spike Is

A memory spike is a sudden, often temporary jump in memory use, a sharp increase at a specific moment, like loading a big level, spawning many objects, or decompressing a large asset. Unlike a leak, a spike isn't continuous growth; it's a momentary surge that may come back down once the work is done.

Spikes cause crashes when the peak exceeds available memory, even briefly, especially on lower-memory devices. Bugnet captures performance and memory-related crashes with context, so you can see spikes correlated with specific events, which points at what's causing the sudden surge.

Why the Distinction Matters for Fixing

The two need different fixes. A leak is fixed by finding and releasing what accumulates, freeing objects, unsubscribing handlers, bounding caches, so memory holds steady. A spike is fixed by reducing the peak, streaming loads instead of loading all at once, spreading allocations, so the momentary surge stays within limits.

Bugnet helps you tell them apart: a leak shows steady growth over a session, a spike shows a sharp jump at a specific event. So diagnose by the pattern, gradual unbounded growth means a leak, a sudden temporary surge means a spike, and apply the fix that matches.

A memory leak is steady, unbounded growth from memory never freed (worsens over a session); a memory spike is a sudden temporary surge at a specific event. Different patterns, different fixes.