Nette sessions + custom save path and automatic GC, IT WORKS

composer.json

{
	"require": {
		"nette/http": "2.2.*"
	}
}

proof.sh

#!/bin/bash

run() {
	ab -n $1 -c $2 http://local/sessions-test/test.php > /dev/null
}
files() {
	echo `ls -1 data/ | wc -l`
}

run 100 20
files
sleep 2
run 100 20
files
sleep 2
run 100 20
files
sleep 2
run 100 20
files
sleep 5
run 1 1
files

test.php

<?php

require __DIR__ . '/vendor/autoload.php';

//$before = iterator_to_array(new FilesystemIterator(__DIR__ . '/data', FilesystemIterator::CURRENT_AS_PATHNAME | FilesystemIterator::SKIP_DOTS));

$session = new Nette\Http\Session((new Nette\Http\RequestFactory)->createHttpRequest(), new Nette\Http\Response());
$session->setName('blablasesstest');
$session->setSavePath(__DIR__ . '/data');
$session->setExpiration('+ 3 seconds');
$session->setOptions([
	'gc_probability' => 100,
	'gc_divisor' => '100',
]);

$session->start();
$session->getSection('test')->foo = 'bar';
$session->close();

//$after = iterator_to_array(new FilesystemIterator(__DIR__ . '/data', FilesystemIterator::CURRENT_AS_PATHNAME | FilesystemIterator::SKIP_DOTS));

//echo 'Before:', PHP_EOL;
//var_dump($before);
//echo 'After:', PHP_EOL;
//var_dump($after);