{"id":389482,"date":"2018-12-21T06:20:16","date_gmt":"2018-12-21T14:20:16","guid":{"rendered":"http:\/\/www.esri.com\/arcgis-blog\/?post_type=blog&p=389482"},"modified":"2024-11-11T12:35:38","modified_gmt":"2024-11-11T20:35:38","slug":"whats-new-with-arcade-taking-a-stroll-through-featuresets-part-2","status":"publish","type":"blog","link":"https:\/\/www.esri.com\/arcgis-blog\/products\/arcade\/arcade\/whats-new-with-arcade-taking-a-stroll-through-featuresets-part-2","title":{"rendered":"What\u2019s new with Arcade: Taking a stroll through FeatureSets (Part 2)"},"author":6981,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","format":"standard","meta":{"_acf_changed":false,"_searchwp_excluded":""},"categories":[777102,22941],"tags":[],"industry":[],"product":[36551],"class_list":["post-389482","blog","type-blog","status-publish","format-standard","hentry","category-arcade","category-mapping","product-arcgis-online"],"acf":{"short_description":"Arcade is one of the many ways you can make smarter, and more elegant maps. Learn how FeatureSets let you work with other layers in your map.","flexible_content":[{"acf_fc_layout":"content","content":"

In Part 1<\/a> of this series, we introduced FeatureSets<\/a> as a way to work with other layers within your map to make more expressive pop-ups by writing just a few lines of code.\u00a0 In Part 2, we\u2019ll look at performance and how to access features in the FeatureSet.<\/p>\n

Before we go further, I think the single most important piece of advice with Arcade is to be purposeful<\/strong> when writing Arcade expressions. Sketch out the goal on a pad of paper first before you start writing and think about the problem you want to solve before you dive in.<\/p>\n

Understanding what\u2019s slowing you down<\/h3>\n

If your expression is slow (e.g. the pop-up is too slow), the fastest way to investigate the performance is to use the Network tab of the Chrome browser debugger (Ctrl+Shift+J) to filter the requests by the word query.\u00a0 Then click a feature on the map, watch the queries being executed and find the bottleneck by looking at the time column. Once you have an idea which query is slowing you down, you can start to understand how you might be able to optimize the expression.<\/p>\n"},{"acf_fc_layout":"image","image":{"ID":389492,"id":389492,"title":"slowdown_arcade","filename":"slowdown_arcade.png","filesize":1110665,"url":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2018\/12\/slowdown_arcade.png","link":"https:\/\/www.esri.com\/arcgis-blog\/products\/arcade\/arcade\/whats-new-with-arcade-taking-a-stroll-through-featuresets-part-2\/slowdown_arcade","alt":"","author":"6981","description":"","caption":"","name":"slowdown_arcade","status":"inherit","uploaded_to":389482,"date":"2018-12-21 12:54:11","modified":"2018-12-21 12:54:11","menu_order":0,"mime_type":"image\/png","type":"image","subtype":"png","icon":"https:\/\/www.esri.com\/arcgis-blog\/wp-includes\/images\/media\/default.png","width":1315,"height":932,"sizes":{"thumbnail":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2018\/12\/slowdown_arcade-150x150.png","thumbnail-width":150,"thumbnail-height":150,"medium":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2018\/12\/slowdown_arcade-300x213.png","medium-width":300,"medium-height":213,"medium_large":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2018\/12\/slowdown_arcade-768x544.png","medium_large-width":768,"medium_large-height":544,"large":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2018\/12\/slowdown_arcade-1024x726.png","large-width":1024,"large-height":726,"1536x1536":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2018\/12\/slowdown_arcade.png","1536x1536-width":1315,"1536x1536-height":932,"2048x2048":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2018\/12\/slowdown_arcade.png","2048x2048-width":1315,"2048x2048-height":932,"card_image":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2018\/12\/slowdown_arcade-656x465.png","card_image-width":656,"card_image-height":465,"wide_image":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2018\/12\/slowdown_arcade.png","wide_image-width":1315,"wide_image-height":932}},"image_position":"center","orientation":"horizontal","hyperlink":""},{"acf_fc_layout":"content","content":"

<\/a><\/p>\n

Chaining, number of queries, and performance<\/h3>\n

Arcade needs to query the data in the feature layer in order to evaluate expressions. Because of that, it stands to reason that the more times an Arcade expression queries the feature layer, the slower the pop-up loads.\u00a0 This is true whether you write one expression that queries the layer multiple times, or write multiple expressions that each query the data. If you recall the map<\/a> from Part 1, you\u2019ll notice that from time to time the pop-up can take a bit longer than you\u2019d like to load.\u00a0 There are 3 expressions in the pop-up:<\/p>\n