Java: Open Source Performance Statistics Tool
By admin on Apr 27, 2009 in Java, open source
Perf4J is a set of utilities for calculating and displaying performance statistics for Java code.
Features
- A simple stop watch mechanism for succinct timing statements.
- A command line tool for parsing log files that generates aggregated statistics and performance graphs.
- Easy integration with the most common logging frameworks and facades: log4j, java.util.logging, Apache Commons Logging and SLF4J.
- Custom log4j appenders to generate statistics and graphs in a running application (custom java.util.logging handlers coming soon).
- The ability to expose performance statistics as JMX attributes, and to send notifications when statistics exceed specified thresholds.
- A servlet for exposing performance graphs in a web application.
- A Profiled annotation and a set of custom aspects that allow unobstrusive timing statements when coupled with an AOP framework such as AspectJ or Spring AOP.
- An extensible architecture.
One of the main benefits of Perf4J is that it allows performance analysis and monitoring on live production applications through extensions to common logging frameworks like log4j.
Sample output:
Performance Statistics 20:32:00 - 20:32:30
Tag Avg(ms) Min Max Std Dev Count
codeBlock1 249.4 2 487 151.3 37
codeBlock2.failure 782.9 612 975 130.8 17
codeBlock2.success 260.7 6 500 159.5 20
Performance Statistics 20:32:30 - 20:33:00
Tag Avg(ms) Min Max Std Dev Count
codeBlock1 244.0 7 494 150.6 41
codeBlock2.failure 747.9 531 943 125.3 21
codeBlock2.success 224.1 26 398 106.8 21
Performance Statistics 20:33:00 - 20:33:30
Tag Avg(ms) Min Max Std Dev Count
codeBlock1 289.3 10 464 141.1 22
codeBlock2.failure 781.1 599 947 135.1 8
codeBlock2.success 316.2 115 490 112.6 13
