You may have had a look at your API request history and wondered why running the same endpoint can often result in varying response times.
Here are a few common reasons why:
The varying size of inputs in different runs - processing a file upload of 1GB may take a little longer than a 100 MB file.
Whether the endpoint is being pinged many times at once (endpoint gets hit multiple times in the same 5 seconds let's say, the execution times become much much higher)
Other things are happening in the instance like other endpoints being called at the same time, and backgrounds tasks being run. This is because the instance shares the same resources.