EDD faster downloads page

history-downloads.php

<?php
// New function to get the cart details for an array of purchase ids
function edd_get_user_payments_cart_detail( $payment_ids, $include_bundle_files = false ) {
	global $wpdb;

	$payment_ids = array_filter( $payment_ids, 'is_numeric' );
	$payments = $wpdb->get_results("SELECT post_ID, meta_value FROM {$wpdb->postmeta} WHERE meta_key = '_edd_payment_meta' AND post_ID in (" . implode( $payment_ids, ',' ). ")");
	$all_details = array();

	if ( ! empty( $payments ) ) {
		foreach ( $payments as $payment ) {
			$payment_meta = maybe_unserialize( $payment->meta_value );
			$payment_id = $payment->post_ID;

			$cart_details = isset( $payment_meta['cart_details'] ) ? maybe_unserialize( $payment_meta['cart_details'] ) : array();

			if ( ! empty( $cart_details ) && is_array( $cart_details ) ) {

				foreach ( $cart_details as $key => $cart_item ) {

					// use existing code here L993 - L1034 broken out into a separate function
          // https://github.com/easydigitaldownloads/easy-digital-downloads/blob/master/includes/payments/functions.php#L993-L1034

				}

				$all_details[ $payment_id ] = apply_filters( 'edd_payment_meta_cart_details', $cart_details, $payment_id );
			}
		}
	}

	return $all_details;
}

// Now, in history-downloads.php, change:
$purchases = edd_get_users_purchases( get_current_user_id(), 20, true );
if ( $purchases ) :
	do_action( 'edd_before_download_history' );
  
// to:
$purchases = edd_get_users_purchases( get_current_user_id(), 20, true );
if ( $purchases ) :
	$payment_ids = array();
	foreach ( $purchases as $payment ) {
		$payment_ids[] = $payment->ID;
	}
	$all_downloads = edd_get_user_payments_cart_detail( $payment_ids, true );

	do_action( 'edd_before_download_history' );
  
 // And change:
 $downloads      = edd_get_payment_meta_cart_details( $payment->ID, true );
 
 // to:
 $downloads      = $all_downloads[ $payment->ID ];