{
	"id": "172826",
	"key": "TIMOB-26699",
	"fields": {
		"issuetype": {
			"id": "6",
			"description": "gh.issue.epic.desc",
			"name": "Epic",
			"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": [],
		"resolution": null,
		"resolutiondate": null,
		"created": "2019-01-08T01:03:11.000+0000",
		"priority": {
			"name": "High",
			"id": "2"
		},
		"labels": [],
		"versions": [
			{
				"id": "20238",
				"description": "",
				"name": "Release 7.5.0",
				"archived": false,
				"released": true,
				"releaseDate": "2018-11-15"
			}
		],
		"issuelinks": [
			{
				"id": "57091",
				"type": {
					"id": "10003",
					"name": "Relates",
					"inward": "relates to",
					"outward": "relates to"
				},
				"inwardIssue": {
					"id": "172048",
					"key": "TIMOB-26292",
					"fields": {
						"summary": "Windows: Switching to JsRT (Chakra) for better performance",
						"status": {
							"description": "The issue is open and ready for the assignee to start work on it.",
							"name": "Open",
							"id": "1",
							"statusCategory": {
								"id": 2,
								"key": "new",
								"colorName": "blue-gray",
								"name": "To Do"
							}
						},
						"priority": {
							"name": "High",
							"id": "2"
						},
						"issuetype": {
							"id": "6",
							"description": "gh.issue.epic.desc",
							"name": "Epic",
							"subtask": false
						}
					}
				}
			}
		],
		"assignee": {
			"name": "kiguchi",
			"key": "kota",
			"displayName": "Kota Iguchi",
			"active": false,
			"timeZone": "America/Los_Angeles"
		},
		"updated": "2019-03-08T02:08:07.000+0000",
		"status": {
			"description": "The issue is open and ready for the assignee to start work on it.",
			"name": "Open",
			"id": "1",
			"statusCategory": {
				"id": 2,
				"key": "new",
				"colorName": "blue-gray",
				"name": "To Do"
			}
		},
		"components": [
			{
				"id": "12642",
				"name": "Windows",
				"description": "Windows authoring support"
			}
		],
		"description": "Peformance has been the issue on Windows for a long time. From what I observed, some basic JavaScript operations (like calling constructor, accessing properties and functions) against Titanium proxy objects are simply slow. For instance, creating 200 proxy objects on Windows (Titanium 7.4.0.GA) takes about 2 seconds on Windows locally for me.\r\n\r\n{code:javascript}\r\nvar win = Ti.UI.createWindow({ backgroundColor: 'green' });\r\n\r\nwin.addEventListener('open', function() {\r\n    var start = +new Date();\r\n    for (var i = 0; i < 200; i++) {\r\n        win.add(Ti.UI.createView({\r\n            width: 50, height: 50, left: i * 10, top: i * 10\r\n        }));\r\n    }\r\n    // setTimeout() effectively push tasks on UI thread.\r\n    // This can be useful when you need to see actual UI response time.\r\n    setTimeout(function() {\r\n        alert((+new Date() - start) + ' m seconds elapsed');\r\n    }, 0)\r\n});\r\nwin.open(); \r\n{code}\r\n\r\nWe might be able to \"gradually\" improve performance by fixing following areas:\r\n\r\n* UI rendering engine ... I expect there could be some redundant rendering calls that can be optimized.\r\n* Optimize WinRT API call ... Passing WinRT boundaries are horribly slow. We want to eliminate the calls as much as we can\r\n* HAL ... It is heavy weight framework that is not quite efficient. We might be able to make it more lightweight.\r\n",
		"attachment": [],
		"flagged": false,
		"summary": "Windows: Runtime Performance Improvement",
		"creator": {
			"name": "kiguchi",
			"key": "kota",
			"displayName": "Kota Iguchi",
			"active": false,
			"timeZone": "America/Los_Angeles"
		},
		"subtasks": [],
		"reporter": {
			"name": "kiguchi",
			"key": "kota",
			"displayName": "Kota Iguchi",
			"active": false,
			"timeZone": "America/Los_Angeles"
		},
		"environment": null,
		"comment": {
			"comments": [],
			"maxResults": 0,
			"total": 0,
			"startAt": 0
		}
	}
}