I just ported one of our big project to Gradle and we just found out (via scans) that compileJava on simple modifications is taking much longer compared to our previous setup (plain project, dependencies included via Netbeans Libraries). Previously, whenever something was modified only a few classe…

Share the build scan. Or read through the build with --info to see why the unexpected tasks are being triggered.

here is one scan, but I dont see anything helpful

Looks like everything is a large module. Step 1: break up the project into smaller modules via gradle’s multimodule system enable parallel builds That will get you most of the improvements you want without much hassle. Step 2: Then when you’re confident the incremental support is working, enab…

Hi Giuseppe, did you check out if incremental Java compilation is enabled: https://docs.gradle.org/current/userguide/java_plugin.html#sec:incremental_compile ? It should be enabled by default. You can run with --info to see how many classes are recompiled. Normally, only a fraction of the classes …

[image] hsrinara: Looks like everything is a large module. Step 1: break up the project into smaller modules via gradle’s multimodule system enable parallel builds That will get you most of the improvements you want without much hassle. Honestly I’m reluctant to do this because this means…

Hi Giuseppe, does it also mention a reason why full recompilation happens? When it shows full recompilation, then it means that all classes are re-compiled. And that explains the extra time the task takes. Cheers, Stefan

You can see in the link above ( here again), it’s a gist (I just modify a System.println in the mentioned class to simulate the smallest change): Task ‘:compileJava’ is not up-to-date because: Input property ‘source’ file D:\DEVELOPMENT\EMM-Check\src\main\java\ec\gui\dialogs\vrserver\EC_VrClientLi…

Are you changing a constant in the class? This is from the user manual: Since constants can be inlined, any change to a constant will result in Gradle recompiling all source files. For that reason, you should try to minimize the use of constants in your source code and replace them with static met…

No, just a println in a constructor public EC_VrClientListener(REKNOW_Client client) { this.client = client; startPolling(); System.out.println("asa"); }

IIUC, if the class has public constants, then it is considered a dependency to all other classes. See https://github.com/gradle/gradle/issues/6482 .

Why Gradle compileJava is much slower than a plain project?

Help/Discuss

Dieter_K1 (Dieter K) July 25, 2019, 10:41am 16

Some dude already pointed this out a few days ago: Speed up compilation

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Why Gradle compileJava is much slower than a plain project?

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