Node.js + OpenCV readImage() memory leaks

[fabek]

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.

[Queuecumber]

You can try freeing the memory yourself using the release method

On Wed, May 25, 2016, 06:49 fabek [email protected] wrote:

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);
});
});
});

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#411

[fabek]

No, I can't under Javascript. im.release() doesn't work anymore. It's possible under C++ only.

[Queuecumber]

Why do you think that? Was it broken recently or something?

On Sun, May 29, 2016, 08:14 fabek [email protected] wrote:

No, I can't under Javascript. im.release() doesn't work anymore. It's
possible under C++ only.

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