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What are the most common performance optimization mistakes made by game developers?

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Performance optimization is a crucial aspect of game development, as it ensures that your game runs smoothly and efficiently on different platforms and devices. However, many game developers make some common mistakes that can negatively affect the performance of their games and frustrate their players. In this article, we will discuss what these mistakes are and how to avoid them.

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Leonardo Cunha

Creative Director | Game Designer | Game Producer | Project Manager | Product Manager

1 Not profiling your game

One of the biggest mistakes you can make as a game developer is to optimize your game without profiling it first. Profiling is the process of measuring and analyzing the performance of your game, such as CPU, GPU, memory, and network usage, frame rate, and load times. Profiling helps you identify the bottlenecks, bugs, and inefficiencies that are slowing down your game and wasting resources. Without profiling, you might end up optimizing the wrong things or making things worse. Therefore, you should always profile your game before and after making any changes, and use the appropriate tools and methods for your platform and engine.

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2 Not using asset bundles

Another common mistake is to load all your assets, such as textures, models, sounds, and animations, at once or on demand, without using asset bundles. Asset bundles are packages of assets that can be loaded and unloaded dynamically at runtime, reducing the memory footprint and loading time of your game. Asset bundles also allow you to update and patch your assets without having to rebuild your entire game. However, many game developers either ignore asset bundles or use them incorrectly, resulting in poor performance and memory management. Therefore, you should learn how to create, organize, and use asset bundles effectively for your game.

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3 Not optimizing your code

Code optimization is an essential part of performance optimization, as it affects the speed and efficiency of your game logic and algorithms. Unfortunately, many game developers write code that is overly complex, redundant, or wasteful, leading to performance issues and bugs. Common code optimization mistakes include using unnecessary loops or recursion, expensive operations like square root or trigonometry, global variables or singletons, and creating and destroying objects too frequently. It is important to use data structures and algorithms that are suitable for your needs and write code that is simple, clear, and reusable. Profiling tools and debugging tools can help you identify and fix any performance problems in your code.

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Zvi M.
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Not thinking about the year 3 goal, the scale to come while you are working on a title could be the downfall of that game. Frankenstein builds are the Achilles heel of those trying to publish a game. Don't rush, take the time and do it right, you'll thank me later! :)

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4 Not optimizing your graphics

Graphics optimization is an essential component of performance optimization, as it determines the visual appeal and realism of your game. Unfortunately, many game developers make mistakes when it comes to graphics settings, such as using too many or large textures, models, or lights; incompatible shaders, effects, or post-processing; and not utilizing level of detail (LOD), occlusion culling, frustum culling, batching, instancing, atlasing, compression, mipmaps, or streaming. To avoid these issues, you should use graphics settings that are appropriate for your target platform and device and use profiling tools and graphics tools to identify and address any performance problems related to graphics.

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Leonardo Cunha

Creative Director | Game Designer | Game Producer | Project Manager | Product Manager
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Graphics are essential for the visual appeal of games, but unoptimized graphics can severely impact performance. Developers often fall into the trap of using high-resolution textures, complex shaders, or excessive visual effects without considering their performance implications. To optimize graphics, techniques such as texture compression, shader simplification, batching, and culling are crucial. Texture compression reduces memory usage, while simplified shaders and batching minimize GPU overhead. Additionally, culling techniques avoid rendering unnecessary objects, enhancing rendering efficiency. Implementing these optimizations ensures that games deliver visually stunning experiences without sacrificing performance.

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5 Not optimizing your audio

Audio optimization is an essential part of performance optimization, as it affects the sound quality of your game. Unfortunately, many game developers make mistakes in their audio settings that can cause performance issues and audio glitches. These mistakes include using too many or too loud audio sources, clips, or filters; using uncompressed or lossless audio formats; not using audio mixers, groups, or snapshots; not using spatialization, attenuation, or occlusion; and not using compression, streaming, or pooling. To ensure optimal audio performance, you should use settings that fit your game genre and style and use profiling tools and audio tools to identify and fix any problems.

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6 Not testing your game

The last and perhaps the most common mistake you can make as a game developer is to not test your game thoroughly and frequently. Testing your game is the only way to ensure that your game works as intended, that your performance optimization efforts are effective, and that your game meets the expectations and requirements of your players and platforms. However, many game developers either test their game too late, too rarely, or too narrowly, resulting in poor performance and quality. Therefore, you should test your game early, often, and widely, and use testing tools and feedback tools to find and fix any performance problems in your game.

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7 Here’s what else to consider

This is a space to share examples, stories, or insights that don’t fit into any of the previous sections. What else would you like to add?

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Leonardo Cunha

Creative Director | Game Designer | Game Producer | Project Manager | Product Manager
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Level of Detail (LOD) is a critical optimization technique that dynamically adjusts the level of detail for objects based on their distance from the camera. Without LOD, games may render high-detail models for distant objects, consuming unnecessary GPU resources. To implement LOD effectively, developers can utilize hierarchical LOD systems, create simplified meshes for lower LOD levels, and use texture atlasing to reduce texture switches. Dynamic LOD adjustment based on factors such as screen size and frame rate ensures optimal performance across different hardware configurations. By implementing LOD effectively, developers can strike a balance between visual quality and performance, resulting in smooth and immersive gaming experiences.

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What are the most common performance optimization mistakes made by game developers?

1

2

3

4

5

6

7

1 Not profiling your game

2 Not using asset bundles

3 Not optimizing your code

4 Not optimizing your graphics

5 Not optimizing your audio

6 Not testing your game

7 Here’s what else to consider

Gaming Industry

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What are the most common performance optimization mistakes made by game developers?

1

2

3

4

5

6

7

1 Not profiling your game

2 Not using asset bundles

3 Not optimizing your code

4 Not optimizing your graphics

5 Not optimizing your audio

6 Not testing your game

7 Here’s what else to consider

Gaming Industry

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