AsyncFunc spawns new thread for each apply() call

[g4s8]

Creating new threads is expensive operation because it allocates a lot of memory, performs system-calls and register descriptors.
It would be better to create Executors.newCachedThreadPool() for async task (or maybe accept Executor as constructor argument) and submit tasks to it:

private final Executor exec = Executors.newCachedThreadPool();

@Override
public Future<Y> apply(final X input) {
    return this.exec.submit(
        () -> this.func.apply(input)
    );
}

[g4s8]

Looks like it was partially fixed in #330

[yegor256]

@0crat in

[0crat]

@0crat in (here)

@yegor256 Job gh:yegor256/cactoos#324 is in scope.

[0crat]

Job gh:yegor256/cactoos#324 assigned to @fabriciofx, please go ahead.

[yegor256]

@rultor release, tag is 0.11.7

[rultor]

@rultor release, tag is 0.11.7

@yegor256 OK, I will release it now. Please check the progress here

[rultor]

@rultor release, tag is 0.11.7

@yegor256 Done! FYI, the full log is here (took me 10min)

[yegor256]

@g4s8 the problem seems to be fixed?

[g4s8]

@yegor256 sure, thanks

[0crat]

Job gh:yegor256/cactoos#324 is out of scope.

[0crat]

+30 points just awarded to @fabriciofx, total is +60