Do we have some kind of Performance Profile like A...

# compose-desktop

[TheMrCodes]

Do we have some kind of Performance Profile like Android for Compose for Desktop?

[suresh]

You can use the amazing JFR (Java Flight recorder) and Mission control tool suite for analyzing perf issues on JVM.
https://docs.oracle.com/en/java/javase/15/troubleshoot/troubleshoot-performance-issues-using-jfr.html#GUID-0FE29092-18B5-4BEB-8D8D-0CBA7A4FEA1D

https://docs.oracle.com/en/java/javase/15/jfapi/index.html

https://jdk.java.net/jmc/8/

[suresh]

Here is the config i am using for continuous profiling, which has less than 1% overhead.

compose.desktop {
    application {
        mainClass = "<http://your.App|your.App>"
        jvmArgs(
            "-XX:StartFlightRecording:settings=default,filename=/tmp/compose-rec.jfr",
            "-XX:FlightRecorderOptions:stackdepth=256",
        )
        nativeDistributions {
            targetFormats(Dmg, Exe, Deb)
            modules(
                "jdk.jfr",
                "jdk.management.jfr",
                "jdk.management.agent"
            )
        }
    }
}

[TheMrCodes]

sounds good but i was looking for something to see how often and when the UI is updating

[suresh]

Yeah, i think that requires some instrumentation support from the compose framework itself. If you want to print the FPS (to console), set the following system properties (jvmArgs())

"-Dskiko.fps.enabled=true",
"-Dskiko.fps.count=200"