Imagecreatefromjpeg and file_get_contents are very slow, seems related

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(''); 

After about 30 seconds these functions work like expected.

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?

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);