How to write the result of the filter in WordPress (assigning missing width height to images) in articles?

Question

WordPress

Good day, dear experts.

Images inserted into articles on a WordPress site do not have width and height tags. This is solved with this code:

add_filter( 'the_content', 'add_image_dimensions' );

function add_image_dimensions( $content ) {

    preg_match_all( '/<img[^>]+>/i', $content, $images);

    if (count($images) < 1)
        return $content;

foreach ($images[0] as $image) {
    preg_match_all( '/(alt|title|src|width|class|id|height)=("[^"]*")/i', $image, $img );

    if ( !in_array( 'src', $img[1] ) )
        continue;

    if ( !in_array( 'width', $img[1] ) || !in_array( 'height', $img[1] ) ) {
        $src = $img[2][ array_search('src', $img[1]) ];
        $alt = in_array( 'alt', $img[1] ) ? ' alt=' . $img[2][ array_search('alt', $img[1]) ] : '';
        $title = in_array( 'title', $img[1] ) ? ' title=' . $img[2][ array_search('title', $img[1]) ] : '';
        $class = in_array( 'class', $img[1] ) ? ' class=' . $img[2][ array_search('class', $img[1]) ] : '';
        $id = in_array( 'id', $img[1] ) ? ' id=' . $img[2][ array_search('id', $img[1]) ] : '';

        list( $width, $height, $type, $attr ) = getimagesize( str_replace( "\"", "" , $src ) );
        $html = '';

        if (($width != 0) || ($height != 0)) {
            $html = ' width="%d" height="%d" ';
        }

        $image_tag = sprintf( '<img src=%s%s%s%s%s' . $html . '/>', $src, $alt, $title, $class, $id, $width, $height );
        $content = str_replace($image, $image_tag, $content);
    }
}

return $content;
}

But due to constant requests, the page generation time increases significantly. How can you write the results of this filter's work once in the articles themselves?