Apple never intended for iPhones to be upgraded or tampered with, so there is little you can do to enhance their performance. Even so, a benchmark is still useful for a few reasons. Know How to benchmark your iphone.

Why Bother To Benchmark Your iPhone?
A synthetic benchmark places your device under an easy-to-repeat load and provides you with a score. Benchmarking tools conduct exact duplicate tests every time, so you don’t have to take into account other factors during the testing.
Traditionally, benchmarks have been used by personal computer enthusiasts as a way to test and improve performance. The overclocking test is useful when measuring the performance of overclocked computers, and also when gauging small adjustments like case airflow or thermal paste application.
Performance benchmarks as well as thresholds for thermal throttling are all tested in these benchmarks. In the future, you can use them to identify artificially slowing down performance bottlenecks and determine where your money should be spent.
A smartphone isn’t like a computer in that regard. Unless you replace the battery or take the iPhone out of its case to improve thermal performance, there isn’t much you can do to improve your benchmark scores with an iPhone.
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In terms of smartphones, benchmarks are only useful in a few situations. To start, you should check the device’s performance to see if it is working as expected. The benchmark can help you see if your performance issue is reflect’s in the numbers. If you’re experiencing performance issues. After that, you can try further diagnosing your slow iPhone and hopefully resolve it.
Additionally, there are less important use cases such as curiosity and bragging rights. In the event that you have upgraded your device. You have kind of interest in running a benchmark between the old and new models to compare the performance. Benchmark tools can also be used to compare your device’s performance with other devices.
Especially in Apple’s ecosystem where software is closely tied to hardware design, numbers do not always reflect real-world performance.
Benchmarking Tools You Can Use
It is true that there are many benchmarking tools designed to test different aspects of system performance. But in the end, they are all measuring the same thing.
Regardless of the platform, GeekBench is a popular benchmarking tool. You can run tests that put your CPU and GPU through their paces by downloading Geekbench 5 from App Store. Once you have a Geekbench Browser open, you can check out how your device is performing.
The AnTuTu benchmarking tool is another popular benchmarking tool for evaluating smartphone performance, especially on Android devices. Another big name in the benchmarking world is 3DMark, which measures the performance of graphics cards and games. Test the latest devices with 3D Mark Wild Life and older models with 3D Mark Sling Shot.
Besides running standard benchmarks, you can also run speedometer (to test web app responsiveness), JetStream (to check WebAssembly performance), and MotionMark (to check motion graphic animation ability) on Safari. Your device’s underlying hardware as well as Safari’s current state play a role in this.
Slow iPhone? Your Battery May Be to Blame
If you experience slow performance on your iPhone, you can restart it for a quick fix, but if the issue persists, you should check the health of the battery. In a bad battery, the iPhone will slow down to prolong the battery life and may not be able to sustain a high level of performance.