{
	"id": "173211",
	"key": "TIMOB-26909",
	"fields": {
		"issuetype": {
			"id": "4",
			"description": "An improvement or enhancement to an existing feature or task.",
			"name": "Improvement",
			"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": "20412",
				"name": "Release 8.1.0",
				"archived": false,
				"released": true,
				"releaseDate": "2019-08-13"
			}
		],
		"resolution": {
			"id": "1",
			"description": "A fix for this issue is checked into the tree and tested.",
			"name": "Fixed"
		},
		"resolutiondate": "2019-04-12T14:21:26.000+0000",
		"created": "2019-03-18T22:17:02.000+0000",
		"epic": {
			"id": 173208,
			"key": "TIMOB-26906",
			"name": "",
			"summary": "Performance improvements during 2019",
			"color": {
				"key": "color_1"
			},
			"done": false
		},
		"priority": {
			"name": "None",
			"id": "6"
		},
		"labels": [
			"android",
			"performance",
			"v8"
		],
		"versions": [],
		"issuelinks": [
			{
				"id": "57473",
				"type": {
					"id": "10020",
					"name": "Depends",
					"inward": "is dependent of",
					"outward": "depends on"
				},
				"outwardIssue": {
					"id": "173421",
					"key": "TIMOB-26957",
					"fields": {
						"summary": "Android: Update V8 runtime to 7.3.492.26",
						"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"
							}
						},
						"priority": {
							"name": "High",
							"id": "2"
						},
						"issuetype": {
							"id": "4",
							"description": "An improvement or enhancement to an existing feature or task.",
							"name": "Improvement",
							"subtask": false
						}
					}
				}
			},
			{
				"id": "57265",
				"type": {
					"id": "10003",
					"name": "Relates",
					"inward": "relates to",
					"outward": "relates to"
				},
				"inwardIssue": {
					"id": "169058",
					"key": "TIMOB-25041",
					"fields": {
						"summary": "Add support for V8 custom startup snapshot",
						"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"
							}
						},
						"issuetype": {
							"id": "2",
							"description": "A new feature of the product, which has yet to be developed.",
							"name": "New Feature",
							"subtask": false
						}
					}
				}
			},
			{
				"id": "58104",
				"type": {
					"id": "10003",
					"name": "Relates",
					"inward": "relates to",
					"outward": "relates to"
				},
				"inwardIssue": {
					"id": "174236",
					"key": "TIMOB-27457",
					"fields": {
						"summary": "Clarification on Titanium bootstrap files",
						"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": "7",
							"description": "gh.issue.story.desc",
							"name": "Story",
							"subtask": false
						}
					}
				}
			},
			{
				"id": "57689",
				"type": {
					"id": "10003",
					"name": "Relates",
					"inward": "relates to",
					"outward": "relates to"
				},
				"inwardIssue": {
					"id": "172087",
					"key": "TIMOB-26316",
					"fields": {
						"summary": "Android: Investigate boot time",
						"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"
							}
						},
						"priority": {
							"name": "None",
							"id": "6"
						},
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							"id": "7",
							"description": "gh.issue.story.desc",
							"name": "Story",
							"subtask": false
						}
					}
				}
			}
		],
		"assignee": {
			"name": "gmathews",
			"key": "gmathews",
			"displayName": "Gary Mathews",
			"active": true,
			"timeZone": "America/Los_Angeles"
		},
		"updated": "2020-01-23T20:09:33.000+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\nDuring an app cold start, Titanium will create a V8 {{Isolate}} one time for the lifetime of the app to be used as the JavaScript runtime. The C++ function call {{v8::Isolate::New()}} is unusually slow.\r\n[V8Runtime.cpp#L228|https://github.com/appcelerator/titanium_mobile/blob/master/android/runtime/v8/src/native/V8Runtime.cpp#L228]\r\n\r\nBy running adding the following code, I'm able to benchmark this function call.\r\n{code:cpp}\r\n#include <time.h>\r\nuint64_t GetCurrentTimeInMilliseconds()\r\n{\r\n\tstruct timespec currentTime;\r\n\tclock_gettime(CLOCK_MONOTONIC, &currentTime);\r\n\tuint64_t value = (uint64_t)currentTime.tv_sec * (uint64_t)1000000;\r\n\tvalue += (uint64_t)currentTime.tv_nsec / (uint64_t)1000;\r\n\treturn value / (uint64_t)1000;\r\n}\r\n\r\nJNIEXPORT void JNICALL Java_org_appcelerator_kroll_runtime_v8_V8Runtime_nativeInit(...)\r\n{\r\n\t// ...\r\n\tuint64_t currentTime = GetCurrentTimeInMilliseconds();\r\n\tisolate = Isolate::New(create_params);\r\n\tLOGI(TAG, \"### Isolate::New() duration: %d\", (int)(GetCurrentTimeInMilliseconds() - currentTime));\r\n\t// ...\r\n}\r\n{code}\r\n\r\nThe below are benchmarks from real physical devices:\r\n* Pixel 2 (Android 9.0; ARM64): {{750ms}}\r\n* Nexus 4 (Android 4.4; ARM32): {{2500ms}}\r\n\r\nThe above eats about half the startup time on a simple \"Hello World\" project. It's unusually slow.\r\n\r\n*To be investigated:*\r\n* Supposedly, creating the {{Isolate}} with an empty snapshot created at build time should significantly improve the performance.\r\n* We should double check that the v8 {{.a}} static library was not compiled in debug mode.\r\n",
		"attachment": [],
		"flagged": false,
		"summary": "Android: Improve V8 cold start performance",
		"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,
		"closedSprints": [
			{
				"id": 1124,
				"state": "closed",
				"name": "2019 Sprint 8",
				"startDate": "2019-03-31T18:03:00.000Z",
				"endDate": "2019-04-12T18:03:00.000Z",
				"completeDate": "2019-04-12T19:04:50.175Z",
				"originBoardId": 114
			}
		],
		"comment": {
			"comments": [
				{
					"id": "447399",
					"author": {
						"name": "gmathews",
						"key": "gmathews",
						"displayName": "Gary Mathews",
						"active": true,
						"timeZone": "America/Los_Angeles"
					},
					"body": "master: https://github.com/appcelerator/titanium_mobile/pull/10817\r\nv8_titanium: https://github.com/appcelerator/v8_titanium/pull/44",
					"updateAuthor": {
						"name": "gmathews",
						"key": "gmathews",
						"displayName": "Gary Mathews",
						"active": true,
						"timeZone": "America/Los_Angeles"
					},
					"created": "2019-04-01T16:58:15.000+0000",
					"updated": "2019-04-01T16:58:15.000+0000"
				},
				{
					"id": "448741",
					"author": {
						"name": "smohammed",
						"key": "smohammed",
						"displayName": "Samir Mohammed",
						"active": true,
						"timeZone": "America/Los_Angeles"
					},
					"body": "Closing ticket, improvement verified in SDK version {{8.1.0.v20190529135224}} performance updates are able to be seen when launching from a cold start.  \r\n\r\nTest and other information can be found at: \r\nmaster: https://github.com/appcelerator/titanium_mobile/pull/10817\r\nv8_titanium: https://github.com/appcelerator/v8_titanium/pull/44",
					"updateAuthor": {
						"name": "smohammed",
						"key": "smohammed",
						"displayName": "Samir Mohammed",
						"active": true,
						"timeZone": "America/Los_Angeles"
					},
					"created": "2019-05-30T13:39:06.000+0000",
					"updated": "2019-05-30T13:39:06.000+0000"
				}
			],
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