Imagecreatefromjpeg and file_get_contents are very slow, seems related

Docker Engine General
1

I notice that PHP function file_get_contents() is very slow (I experience a timeout of about 30 seconds)

I found a ‘solution’ to use curl instead. So I did, but later I found that imagecreatefromjpeg() was slow aswell.
I guess that beneath the surface it uses file_get_contents()?

So I wonder if someone knows a solve for the main problem here.

I use the PHP docker image php-master\8.2\bullseye\apache
And add GD functionality to it like so:

# setup GD extension
RUN apt-get update && \
apt-get install -y libfreetype6-dev libjpeg62-turbo-dev libpng-dev && \
docker-php-ext-configure gd --with-freetype=/usr/include/ --with-jpeg=/usr/include/ && \
docker-php-ext-install gd

Then I have trouble with any PHP script that looks like this:

// Create a blank image and add some text
$im = imagecreatefromjpeg($url);

or like this:

$data = file_get_contents('https://example.com');

After about 30 seconds these functions work like expected.

2

Please, share the output of the following commands

docker version
docker info

Are you sure it is related to Docker?

You mean the curl functions or curl from a shell?

4

Turned out that the slowness didn’t have anything to do with Docker, but was probably related to the data source.

Never the less, in the end I used Curl to load the data and the image.

function readData($url) {
	$ch = curl_init(); // Initialize cURL session
	curl_setopt($ch, CURLOPT_URL, $url); // Set the URL to fetch
	curl_setopt($ch, CURLOPT_RETURNTRANSFER, true); // Return the response instead of outputting it
	$response = curl_exec($ch); // Execute the request and get the response
	curl_close($ch); // Close cURL session
	return $response;
}

function readImage($url){
	$ch = curl_init();
	curl_setopt($ch, CURLOPT_URL, $url);
	curl_setopt($ch, CURLOPT_HEADER, false);
	curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
	curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
	curl_setopt($ch, CURLOPT_USERAGENT, 'Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.11 (KHTML, like Gecko) Chrome/23.0.1271.1 Safari/537.11');
	$res = curl_exec($ch);
	$rescode = curl_getinfo($ch, CURLINFO_HTTP_CODE); 
	curl_close($ch) ;
	return imagecreatefromstring($res);
}