Node.js + OpenCV readImage() memory leaks #411
Description
I have a problem with memory leaks (about 3-4MB each even cycle of this code) on node.js + opencv. I think readImage() method causes that memory issue.
Platform: BananaPi + NodeJS 0.10.29 + OpenCV 2.4.9.1
download.on('end', function(output) {
cv.readImage(path + filename, function(err, im) {
if (err) throw err;
if (im.width() < 1 || im.height() < 1) throw new Error('Image has no size');
im.detectObject('data/cascade.xml', {}, function(err, cars) {
if (err) throw err;
for (var i = 0; i < cars.length; i++) {
car = cars[i];
im.rectangle([car.x, car.y], [car.width, car.height], [0, 255, 0], 2);
}
im.save(path + '_' + filename);
});
});
});
SOLVED: nano /etc/crontab and add line:
* * * * * root sync; sync; sync; echo 3 >/proc/sys/vm/drop_caches;
It isn't beautiful, but it works.