PHP performance analysis: How to efficiently troubleshoot memory overflow and time-consuming problems caused by Excel import under the Yii2 framework?

Efficiently troubleshoot the performance issues of Yii2 framework Excel import

In production environments, importing Excel files often causes PHP memory overflow, and even if the files are small, you may have an "out of memory" error. Especially under the Yii2 framework, when the code volume is large, positioning problems are very difficult. This article provides solutions to efficiently solve such problems using XHProf tool.

Problem: In PHP 7.0.3 environment, when using the Yii2 framework to import a small amount of Excel data, memory overflow still occurs even if the 128M PHP memory limit is set. Manual code review is inefficient.

Solution: XHProf Performance Analysis Tool. XHProf can record the execution process of PHP scripts in detail, including the number of calls, execution time and memory usage of each function. By analyzing the XHProf results, you can quickly identify functions or code blocks with high memory consumption, so as to accurately locate the cause of memory overflow.

Using XHProf, developers can analyze the methods in the Yii2 framework one by one, find out the memory consumption bottleneck, carry out targeted optimization, and ultimately solve the memory overflow problem.

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