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What is Sniffer4j?

Sniffer4j is tool for mesuring Java code performance included in the specified packages.

Why did I need?

Although we can use several methods to obtain microbenchmarks, there are disadvantages as follows:

  • Hard code to the measurement target:
    We have to embed measurement code every time we want to measure,
    and we DO NOT want to corrupt the implementation with code not related essential more than anything else....

  • AspectJ:
    We need to prepare advices for measuring microbenchmarks and also require AspectJ learning costs.

We want to obtain microbenchmarks more SIMPLY!!

Features

Usage

Requirements

  • Java 8+ (-Java 7 does not work)

Build

See instructions as follows:

If use Maven

mvn package

If use Gradle

./gradlew jar

Run the application

java -javaagent:/path/to/sniffer4j.jar=<options> <YOUR_APP>

Options

Option Type Description Example
patterns Regex Regular Expression that specifies the packages to be measure.
You can use ; to specify multiple packages.		 patterns=org.example.*;com.example.controller
logpath String UNDERCONSTRUCTIONS logpath=/path/to/sniffer4j.log

ToDo

  • threshold option
  • JUL(java.util.logging) implementation
  • Pluggable implementation
  • periodically output
  • Virsualization