Script Loader: Increase styles_inline_size_limit from 20K to 50K.

Benchmarking of initial page loads versus repeat page loads shows there is a greater performance improvement to increase inlining versus the benefits of relying on browser cache.

This new limit is expected to be further refined during beta based on additional testing.

Props westonruter, sabernhardt, poena, aristath, spacedmonkey, adamsilverstein, jonoaldersonwp, peterwilsoncc.
See #63007.
Fixes #63018.


git-svn-id: https://develop.svn.wordpress.org/trunk@61013 602fd350-edb4-49c9-b593-d223f7449a82

Author: westonruter

src/wp-includes/script-loader.php

@@ -3055,13 +3055,14 @@ function wp_print_inline_script_tag( $data, $attributes = array() ) {
 function wp_maybe_inline_styles() {
 	global $wp_styles;
 
-	$total_inline_limit = 20000;
+	$total_inline_limit = 50000;
 	/**
 	 * The maximum size of inlined styles in bytes.
 	 *
 	 * @since 5.8.0
+	 * @since 6.9.0 The default limit increased from 20K to 50K.
 	 *
-	 * @param int $total_inline_limit The file-size threshold, in bytes. Default 20000.
+	 * @param int $total_inline_limit The file-size threshold, in bytes. Default 50000.
 	 */
 	$total_inline_limit = apply_filters( 'styles_inline_size_limit', $total_inline_limit );