englercj shared a package for optimizing tiled maps created in Tiled for Phaser games.
"This is a replacement for the tilemap implementation in the Phaser game framework. The purpose of this plugin is to optimize the tilemaps for large complex maps built with the Tiled Map Editor.
This plugin optimizes the rendering of large scrolling tilemaps. It also adds support for many more Tiled features and lots of advanced functionality. You can read 'Why use this plugin?' below for more details.
Simply download the phaser-tiled.js script from the latest release and include it on your page after including Phaser..."