{
	"id": "176319",
	"key": "TIMOB-28565",
	"fields": {
		"issuetype": {
			"id": "1",
			"description": "A problem which impairs or prevents the functions of the product.",
			"name": "Bug",
			"subtask": false
		},
		"project": {
			"id": "10153",
			"key": "TIMOB",
			"name": "Titanium SDK/CLI",
			"projectCategory": {
				"id": "10100",
				"description": "Titanium and related SDKs used in application development",
				"name": "Client"
			}
		},
		"fixVersions": [
			{
				"id": "21249",
				"name": "Release 10.2.0",
				"archived": false,
				"released": false
			}
		],
		"resolution": {
			"id": "1",
			"description": "A fix for this issue is checked into the tree and tested.",
			"name": "Fixed"
		},
		"resolutiondate": "2021-11-02T01:24:32.000+0000",
		"created": "2021-10-22T01:45:04.000+0000",
		"priority": {
			"name": "Medium",
			"id": "3"
		},
		"labels": [
			"ImageView",
			"ListView",
			"android",
			"performance",
			"regression"
		],
		"versions": [
			{
				"id": "21052",
				"description": "",
				"name": "Release 9.3.0",
				"archived": false,
				"released": true,
				"releaseDate": "2020-12-14"
			}
		],
		"issuelinks": [],
		"assignee": {
			"name": "jquick",
			"key": "jquick",
			"displayName": "Joshua Quick",
			"active": true,
			"timeZone": "America/Los_Angeles"
		},
		"updated": "2021-11-02T01:24:32.000+0000",
		"status": {
			"description": "The issue is considered finished, the resolution is correct. Issues which are closed can be reopened.",
			"name": "Closed",
			"id": "6",
			"statusCategory": {
				"id": 3,
				"key": "done",
				"colorName": "green",
				"name": "Done"
			}
		},
		"components": [
			{
				"id": "10202",
				"name": "Android",
				"description": "Android Platform"
			}
		],
		"description": "*Summary:*\r\nIf a {{ListView}} item template contains a lot of {{ImageViews}} (say 16 or more), then this can cause bad scroll performance as of Titanium 9.3.0.\r\n\r\nThis issue is caused by the number of image views. The more image views a single list item has, the worse it gets... even if the no images are assigned (ie: empty image views).\r\n\r\n*Steps to reproduce:*\r\n# Create a Classic app project from template. (Provides needed tab images.)\r\n# Use  [^ListViewTemplateManyImagesTest.js] as the \"app.js\".\r\n# Build and run on Android.\r\n# Fling the ListView and note the scroll performance.\r\n\r\n*Cause:*\r\nThis issue is caused by the {{ZoomControl}} added to every {{Ti.UI.ImageView}} [here|https://github.com/appcelerator/titanium_mobile/blob/ead1713e5e36b4632b692ce6fcc9a9785b91ad26/android/modules/ui/src/java/ti/modules/titanium/ui/widget/TiImageView.java#L143]. Removing the {{ZoomControl}} solves the performance issue.\r\n\r\n*Work-Around 1:*\r\nSet {{ImageView}} property \"touchEnabled\" to {{false}}. This improves scroll performance, but \"Work-Around 2\" is even faster.\r\n\r\n*Work-Around 2:*\r\nInstead of using a {{Ti.UI.ImageView}}, use a {{Ti.UI.View}} and its {{backgroundImage}} instead... but this also means you need to hard-code the \"width\" and \"height\" properties to match the image size.\r\n",
		"attachment": [
			{
				"id": "68020",
				"filename": "ListViewTemplateManyImagesTest.js",
				"author": {
					"name": "jquick",
					"key": "jquick",
					"displayName": "Joshua Quick",
					"active": true,
					"timeZone": "America/Los_Angeles"
				},
				"created": "2021-10-22T01:42:56.000+0000",
				"size": 1336,
				"mimeType": "application/x-javascript"
			}
		],
		"flagged": false,
		"summary": "Android: ListView item containing several ImageViews can cause bad scroll performance as of 9.3.0",
		"creator": {
			"name": "jquick",
			"key": "jquick",
			"displayName": "Joshua Quick",
			"active": true,
			"timeZone": "America/Los_Angeles"
		},
		"subtasks": [],
		"reporter": {
			"name": "jquick",
			"key": "jquick",
			"displayName": "Joshua Quick",
			"active": true,
			"timeZone": "America/Los_Angeles"
		},
		"environment": null,
		"comment": {
			"comments": [
				{
					"id": "459137",
					"author": {
						"name": "jquick",
						"key": "jquick",
						"displayName": "Joshua Quick",
						"active": true,
						"timeZone": "America/Los_Angeles"
					},
					"body": "PR (master): https://github.com/appcelerator/titanium_mobile/pull/13146",
					"updateAuthor": {
						"name": "jquick",
						"key": "jquick",
						"displayName": "Joshua Quick",
						"active": true,
						"timeZone": "America/Los_Angeles"
					},
					"created": "2021-10-26T00:37:05.000+0000",
					"updated": "2021-10-26T00:37:05.000+0000"
				}
			],
			"maxResults": 1,
			"total": 1,
			"startAt": 0
		}
	}
}