Using Business Haarway’s Speed Test Tool, you can check website performance, track your website’s speed issues, overall performance, etc. As this tool is FREE, you can make the most of it sans spending anything!
Give this tool a shot to perform a detailed mobile page speed test and pinpoint issues resulting in plummeting load speed, track big images causing bottlenecks, test TTFB, monitor rendering speed across multiple browsers, analyze page size, etc.