Menu
This may be a silly question for some pro java coders but I am going mad right now, so I am still asking. Please guide me in right direction someone.
How do I analyze which method/partOfMethod is consuming more time in my java program?
(I am using Eclipse and Junit)
628
currentTimeMillis(); long elapsedTime = end - start; In the example above, we're using the “System. currentTimeMillis()” static method. The method returns a long value, which refers to the number of milliseconds since January 1st, 1970, in UTC.
A Java Profiler is a tool that monitors Java bytecode constructs and operations at the JVM level. These code constructs and operations include object creation, iterative executions (including recursive calls), method executions, thread executions, and garbage collections.
Step 1: Open Eclipse and click File > New > Java Project. Step 2: Provide the Project Name and click on the Finish button. Step 3: In the Package Explorer (left-hand side of the window) select the project which you have created. Step 4: Right-click on the src folder, select New > Class from the submenu.
write a main method on your class, and call your test method. To check by running just write a main method and call this method with arguments. If you want to have a test case, take a look at JUnit or Mokito to write a test. There should be a way to run parts or the code without writing a main method or a test-class.
Use jvisualvm. It is bundled in with the JDK nowadays, but a standalone version exists as well, which is more up to date. Typically, when you start it you can pick which running java process to connect to (this may well be our running unit test). You can specify which qualified class name filters you need to track. Normally, some class instrumentation will ensue, and you will be able to track the processing time allocated to each method (cumulative time as well).
157
If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
Donate Us With
