How Do You Avoid Common Performance Bottlenecks?

As software development constantly changes, maintaining optimal performance is essential to providing a flawless user experience. It can be challenging to navigate the terrain of possible performance bottlenecks. The difficulties faced by developers range from inconsistent device requirements to wasteful code. This article addresses the crucial query, “How do you avoid common performance bottlenecks?”. By exploring tactics that include code optimization, effective resource management, and comprehensive testing, we hope to offer knowledge that enables developers to anticipate and solve performance issues before they arise.

Additionally, we’ll explore the role of a real device cloud in validating performance across a spectrum of devices. In this article, let’s learn the best ways to avoid performance snags and ensure your software can withstand a variety of user circumstances.

Adding a real device cloud to the testing process makes it even more rigorous and guarantees that apps are thoroughly tested on various devices and scenarios. LambdaTest is one such platform that offers a real device cloud to avoid common performance bottlenecks.

LambdaTest is an AI-powered test orchestration and execution platform to run manual and automated tests at scale. The platform allows you to perform real-time and automation testing across 3000+ environments and real mobile devices.

What Is A Performance Bottleneck?

When a single component restricts the functionality of a computer system or program, it’s referred to as a bottleneck. The feature impedes the process flow, whether part of the physical infrastructure or the software stack. It reduces the system’s overall capacity, which causes issues including prolonged load times, more downtime, and high levels of end-user annoyance. Consider a bottle’s neck; it tapers from a broader opening at the base to a smaller one at the top. A narrow channel could be ideal for your favorite beverage bottle but not for application functionality!

How Do Bottlenecks Impact User Experience?

We all know that in the rapidly evolving world of modern technology, an application can only satisfy users if it functions as intended or better! In our line of work, user experience is crucial, and maintaining client satisfaction requires investigating the problems that impact user experience. If the application does not function as intended or takes too long to load, the user experience is negatively affected. Bottlenecks make a website more challenging to find on search engine results pages (SERPs) and hinder its proper operation.

How To Identify A Bottleneck?

The most typical signs of bottlenecks include software malfunctions, lengthy load times, sluggish response times, and system outages. When confronted with an application bottleneck, one may question if there is a coding problem. “Is there a problem with memory usage, the network, or the CPU?” Although there are numerous potential reasons for the performance lag, Gatling and Gatling Enterprise’s technologies can assist in identifying the source and restoring your application’s functionality.

With the increasing complexity of application software, finding bottlenecks is getting harder and harder. The primary method for figuring out what’s causing a performance bottleneck is performance testing. Testing website traffic load helps examine the application’s performance under different conditions. Collecting information and devising a plan to maximize efficiency and speed is the first step toward locating and eliminating bottlenecks.

Common Causes of Application Performance Bottlenecks:

It is essential to comprehend the typical causes of bottlenecks to prevent them. Let’s investigate specific application performance bottlenecks and discover how to stop them from causing your next performance hiccup.

Software Restrictions

Application software development requires significant time, effort, communication, and organization but may also cause a limiting bottleneck. You cannot use your multi-core processors or large RAM if you design your application using a framework that cannot support multiple CPU streams. You would then run into a software bottleneck.

Well-written code is crucial when it comes to maximizing application performance. To start debugging a software bottleneck, examine how well the code uses system resources and how efficient it is. An open process must have efficient, clean code. End users are delighted, and the program is dependable when the code runs swiftly and efficiently. Software bottlenecks can be avoided or resolved by adhering to development-based best practices, using group code reviews, and maintaining open and transparent communication within the development team. Rewriting or patching code may also be necessary to restore the application’s functionality.

CPU Utilization:

The majority of performance bottlenecks are probably caused by the CPU. When the processor is unable to fulfill the requests made of it, something happens. Slowdowns can occur by overloading the system with too many processing requests. CPUs process data, run programs, respond to information requests, and query databases. A bottleneck occurs when the amount of data that can be processed exceeds the amount waiting to be processed. There is a backlog because of the insufficient processing capacity. Unexpectedly high traffic, ineffective server-side scripting, or inadequate caching might result in bottlenecks in CPU consumption.

Game-based apps are one instance of a CPU bottleneck.  If the processing speed of the CPU is slower than that of the GPU, a bottleneck may form. The graphics card, or the GPU, uses much CPU power. Lower frame rates, stutters, and annoying slowdowns affect the user experience if the CPU cannot keep up with the graphics card. Because the CPU and GPU work together to create the final image, a bottleneck occurs when one takes longer.

The number of requests and processing loads must be within the CPU power restrictions for the server to function properly. Depending on the application’s requirements, you might need to upgrade to a more potent CPU to guarantee a larger cache, faster clock rates, or supported threads.

Database queries

Bottlenecks can result from making excessively many database calls for simple tasks. Furthermore, limiting users’ access to back-end database servers might negatively affect performance and aggravate users. Find the most extended portions of the queries during development and investigate how to reduce the execution time to prevent a slowdown caused by database queries.

Use database monitoring by sending traffic to the database server through load-testing scripts. Examine the data to determine how well the queries handled a load. To maximize performance, continue testing and fine-tuning after that.

Memory Utilization

RAM stores information and allows the CPU to access it. The amount of processes your CPU can handle depends on the server system’s RAM resources. Therefore, an application’s performance would be hampered by insufficient RAM. For instance, even with a robust CPU for your servers, there would still be a memory bottleneck without enough RAM.

To resolve or prevent a memory utilization bottleneck, increase the speed and memory of RAM. Examine your code since problems like memory bloat or leaks can cause bottlenecks. Memory bloat is a sudden spike in memory utilization, whereas memory leak is a slow, steady increase in memory usage.

Network Utilization:

A network bottleneck may occur if the volume of data flow is restricted because of insufficient network bandwidth. The bottleneck restricts the data flow over the network; this hot spot frequently causes sluggish data transfer or frozen webpages, frustrating end users and tempting them to do business elsewhere. A mismatched piece of hardware, excessive fan-in, or an overburdened server or network communication device could all cause a network bottleneck. For instance, a hardware mismatch might occur if a team server installed a GbE port, but the switch port that connects to it only has a 10/100 Ethernet port. There would be a bottleneck due to the gradual switch.

You could find out which network parts are operating more slowly than others by testing network performance at different points along the data stream. By adding or updating servers, as well as upgrading network hardware such as hubs and routers, the bottleneck in the network can be avoided or eliminated.

Disk Usage

Unquestionably, long-term storage—including HDDs and SSDs—can be the source of a difficult-to-resolve bottleneck. A problem with the physical size of the disk or the speed at which data is read from or written to the disk is most likely the root cause of a disk use bottleneck. Upgrading to SSD disk storage helps alleviate bottlenecks when server-side code involves many disk operations. Reducing fragmentation and raising RAM caching rates are two more resolution techniques.

This kind of bottleneck is frequently caused by a disk storage system that was poorly designed. Design errors could include employing a short array cache, having too few spindles in a RAID group, or using low-RPM SATA drives, which are underperforming.

You can prevent storage-related bottlenecks by knowing how your physical storage corresponds with underlying LUNs, disks, and RAID groups. Resolving this bottleneck is crucial for dynamic online applications requiring regular data transfer between the client, server, and database.

Can Bottlenecks Change Locations?

There are several situations in which a bottleneck could shift to a different part. These could be the workload’s varying needs or the interaction between the hardware and software.


In a matter of seconds, the workload’s requirements can alter significantly. For example, varying application activity or I/O sizes can affect where a bottleneck is located.

Hardware – Software Relationship:

Software is created based on presumptions about hardware capabilities. Software constraints will be visible if the hardware is upgraded. As a result, software must be adjusted as needed for updated hardware.


Producing high-quality software in the ever-changing development environment requires skillfully negotiating and avoiding typical performance bottlenecks. Through the use of practical code principles, prudent resource allocation, and thorough testing procedures, developers can proactively address possible performance problems.

By taking proactive steps and utilizing the flexibility of real device cloud testing, developers may improve user experiences and reduce the possibility of performance-related issues. Adopting these tactics positions software for success in the rapidly changing digital landscape while promoting a culture of performance excellence.

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