File age measurements show the distribution of file ages (days since the first commit) and the recency of file updates (days since the latest commit).

Summary

Number of files: 381
Daily file updates (only one update per file and date counted): 7051
First update: 2014-05-14
Latest update: 2022-03-30
Days between first and latest update: 2878 (411 weeks, estimated 2055 working days)
Active days (at least one file change): 1682
Data:

Organized per file

File Change History Overall

File Age Distribution Overall

Days since first update

There are 381 files with 42,592 lines of code in files.

357 files that are 366+ days old (40,478 lines of code)
8 files that are 181-365 days old (1,121 lines of code)
2 files that are 91-180 days old (145 lines of code)
13 files that are 31-90 days old (808 lines of code)
1 files that are 1-30 days old (40 lines of code)

Legend:

366+

181-365

91-180

31-90

1-30

explore: zoomable circles

Latest Change Distribution Overall

Days since last update

There are 381 files with 42,592 lines of code in files.

93 files have been last changed 366+ days ago (3,125 lines of code)
30 files have been last changed 181-365 days ago (1,839 lines of code)
6 files have been last changed 91-180 days ago (695 lines of code)
236 files have been last changed 31-90 days ago (32,212 lines of code)
16 files have been last changed 1-30 days ago (4,721 lines of code)

Legend:

366+

181-365

91-180

31-90

1-30

explore: zoomable circles

File Change History per File Extension

js, ts, json, md, snap, npmignore, mjs, yml, cjs, css, svg, jsx, txt, gitignore, tsx, watchmanconfig, gitattributes, patch, sh, xml, editorconfig, yaml, babelrc, toml, hbs, eslintignore, prettierignore

File Age Distribution per Extension

Days since first update

366+

181-365

91-180

31-90

1-30

Latest Change Distribution per Extension

Days since last update

366+

181-365

91-180

31-90

1-30

File Change History per Logical Decomposition

primary

primary (file age distribution)

Days since first update

366+

181-365

91-180

31-90

1-30

primary (latest change distribution)

Days since last update

366+

181-365

91-180

31-90

1-30

Oldest Files (Top 50)

File	# lines	# units	last modified (days ago)	created (days ago)	# changes	# contributors
index.js in packages/babel-preset-jest	5	-	738	2240	10	5
build.js in scripts	110	4	46	2132	49	17
watch.js in scripts	62	-	67	2130	20	8
testSetupFile.js in root	1	-	325	2079	12	8
mapCoverage.js in scripts	19	-	531	2078	10	7
test.js in packages/pretty-format/perf	89	2	46	1950	20	9
crowdin.yaml in root	38	-	350	1816	10	5
test.js in packages/jest-worker/src/__performance_tests__	135	7	53	1654	14	7
pi.js in packages/jest-worker/src/__performance_tests__/workers	10	-	753	1654	6	4
worker_farm.js in packages/jest-worker/src/__performance_tests__/workers	8	2	753	1654	6	4
jest_worker.js in packages/jest-worker/src/__performance_tests__/workers	7	2	753	1654	6	4
custom.css in website/static/css	277	-	129	1647	11	8
jest.css in website/static/css	268	-	100	1647	14	10
browserconfig.xml in website/static/img/favicon	9	-	1389	1647	2	2
runner.js in packages/jest-circus	2	-	65	1419	6	5
jest.config.js in root	67	-	64	1337	33	19
jest.config.ci.js in root	15	-	795	1337	9	5
babel-plugin-jest-native-globals.js in scripts	106	1	53	1269	7	3
checkCopyrightHeaders.js in scripts	131	2	65	1247	17	6
babel.config.js in root	41	-	65	1214	24	8
index.js in packages/diff-sequences/perf	119	7	53	1181	5	2
fetchSupporters.js in website	35	2	531	1174	7	4
index.ts in packages/diff-sequences/src	602	1	67	1164	5	2
index.ts in packages/pretty-format/src	465	19	46	1164	28	13
Immutable.ts in packages/pretty-format/src/plugins	190	2	46	1164	6	1
collections.ts in packages/pretty-format/src	153	4	46	1164	11	6
DOMElement.ts in packages/pretty-format/src/plugins	104	3	66	1164	11	5
ReactElement.ts in packages/pretty-format/src/plugins	96	-	46	1164	14	8
markup.ts in packages/pretty-format/src/plugins/lib	91	-	46	1164	6	1
types.ts in packages/pretty-format/src	77	-	58	1164	10	8
AsymmetricMatcher.ts in packages/pretty-format/src/plugins	74	-	46	1164	6	2
ReactTestComponent.ts in packages/pretty-format/src/plugins	66	-	531	1164	9	4
ConvertAnsi.ts in packages/pretty-format/src/plugins	61	-	740	1164	7	2
DOMCollection.ts in packages/pretty-format/src/plugins	57	-	46	1164	8	2
index.ts in packages/jest-get-type/src	51	1	350	1164	5	5
index.ts in packages/jest-regex-util/src	18	-	46	1164	4	2
escapeHTML.ts in packages/pretty-format/src/plugins/lib	3	1	1164	1164	1	1
index.ts in packages/jest-diff/src	162	7	46	1163	20	6
git.ts in packages/jest-changed-files/src	87	1	58	1163	16	7
index.ts in packages/jest-changed-files/src	52	1	58	1163	11	3
index.ts in packages/jest-leak-detector/src	49	3	46	1163	15	6
types.ts in packages/jest-diff/src	42	-	169	1163	8	3
hg.ts in packages/jest-changed-files/src	38	1	66	1163	12	5
diffStrings.ts in packages/jest-diff/src	32	-	531	1163	5	3
types.ts in packages/jest-changed-files/src	14	-	58	1163	5	2
constants.ts in packages/jest-diff/src	4	-	708	1163	3	2
index.ts in packages/jest-matcher-utils/src	466	3	46	1162	28	8
index.ts in packages/jest-docblock/src	103	6	46	1162	8	4
Config.ts in packages/jest-types/src	449	-	40	1161	63	37
index.ts in packages/jest-message-util/src	313	2	46	1161	31	9

Files Not Recently Changed (Top 50)

File	# lines	# units	last modified (days ago)	created (days ago)	# changes	# contributors
browserconfig.xml in website/static/img/favicon	9	-	1389	1647	2	2
escapeHTML.ts in packages/pretty-format/src/plugins/lib	3	1	1164	1164	1	1
specialChars.ts in packages/jest-util/src	9	-	1160	1160	1	1
getPlatformExtension.ts in packages/jest-haste-map/src/lib	16	1	1158	1158	1	1
blacklist.ts in packages/jest-haste-map/src	35	-	1158	1158	1	1
types.ts in packages/jest-console/src	26	-	1139	1139	1	1
ExpectationFailed.ts in packages/jest-jasmine2/src	1	-	1137	1137	1	1
errors.ts in packages/jest-cli/src/init	17	2	1137	1137	1	1
cleanupSemantic.ts in packages/jest-diff/src	395	8	1037	1037	1	1
version.ts in packages/jest-core/src	4	1	1003	1003	1	1
index.ts in packages/jest-cli/src	1	-	963	1137	5	1
deepCyclicCopy.ts in packages/jest-util/src	66	3	888	1160	6	4
colors.ts in packages/jest-snapshot/src	9	-	879	879	1	1
dedentLines.ts in packages/jest-snapshot/src	97	-	878	878	1	1
interopRequireDefault.ts in packages/jest-util/src	3	1	796	1123	2	2
pluralize.ts in packages/jest-util/src	3	1	796	1155	2	1
getNoTestFoundPassWithNoTests.ts in packages/jest-core/src	4	1	796	1026	4	3
clearLine.ts in packages/jest-util/src	5	1	796	1160	3	1
pluralize.ts in packages/jest-core/src	7	1	796	1140	3	2
preRunMessage.ts in packages/jest-util/src	13	-	796	1155	4	1
jest.config.ci.js in root	15	-	795	1337	9	5
index.ts in packages/jest-source-map/src	2	-	753	1139	2	1
types.ts in packages/jest-message-util/src	4	-	753	1154	2	2
types.ts in packages/jest-cli/src/init	6	-	753	1137	4	3
jest_worker.js in packages/jest-worker/src/__performance_tests__/workers	7	2	753	1654	6	4
scroll.ts in packages/jest-watcher/src/lib	8	1	753	1160	3	1
worker_farm.js in packages/jest-worker/src/__performance_tests__/workers	8	2	753	1654	6	4
pi.js in packages/jest-worker/src/__performance_tests__/workers	10	-	753	1654	6	4
index.ts in packages/jest-watcher/src	16	-	753	1160	3	1
constants.ts in packages/jest-haste-map/src	17	-	753	1158	4	2
Timer.ts in packages/jest-jasmine2/src/jasmine	20	3	753	1137	2	2
CallTracker.ts in packages/jest-jasmine2/src/jasmine	52	10	753	1137	2	2
JsApiReporter.ts in packages/jest-jasmine2/src/jasmine	87	14	753	1137	3	3
getAlignedDiffs.ts in packages/jest-diff/src	156	8	753	1037	6	2
index.ts in packages/jest-types/src	6	-	743	1161	15	5
ConvertAnsi.ts in packages/pretty-format/src/plugins	61	-	740	1164	7	2
index.js in packages/babel-preset-jest	5	-	738	2240	10	5
globalErrorHandlers.ts in packages/jest-circus/src	30	-	737	1148	6	4
babel-plugin-jest-replace-ts-require-assignment.js in scripts	20	1	722	967	2	1
normalizePathSep.ts in packages/jest-haste-map/src/lib	9	-	713	1158	3	1
formatTime.ts in packages/jest-util/src	10	-	713	713	1	1
JestHooks.ts in packages/jest-watcher/src	64	1	713	1160	6	2
index.ts in packages/jest-fake-timers/src	2	-	712	1144	3	1
constants.ts in packages/jest-diff/src	4	-	708	1163	3	2
getConfigsOfProjectsToRun.ts in packages/jest-core/src	12	1	705	705	1	1
getProjectNamesMissingWarning.ts in packages/jest-core/src	21	1	705	705	1	1
getSelectProjectsMessage.ts in packages/jest-core/src	36	4	705	705	1	1
NullConsole.ts in packages/jest-console/src	17	-	651	1139	4	3
color.ts in packages/jest-config/src	21	-	626	967	4	2
TestResult.ts in packages/jest-types/src	24	-	622	1161	8	4

Most Recently Created Files (Top 50)

File	# lines	# units	last modified (days ago)	created (days ago)	# changes	# contributors
GitHubActionsReporter.ts in packages/jest-reporters/src	40	2	16	16	1	1
parseShardPair.ts in packages/jest-config/src	31	-	40	40	1	1
types.ts in packages/jest-expect/src	33	-	58	58	1	1
index.ts in packages/jest-expect/src	28	1	57	58	2	2
index.ts in packages/jest-schemas/src	28	-	58	60	2	2
utils.ts in packages/expect-utils/src	321	1	50	65	4	3
jasmineUtils.ts in packages/expect-utils/src	180	9	21	65	2	2
bundleTs.js in scripts	155	-	65	65	1	1
index.ts in packages/jest/src	8	-	65	65	1	1
index.ts in packages/jest-core/src	5	-	65	65	1	1
index.ts in packages/expect-utils/src	4	-	65	65	1	1
types.ts in packages/expect-utils/src	1	-	65	65	1	1
index.ts in packages/jest-repl/src	2	-	65	67	2	1
jest.config.tsd.js in root	12	-	70	70	1	1
runtimeErrorsAndWarnings.ts in packages/jest-transform/src	55	-	46	165	3	2
fileWalkers.ts in packages/jest-resolve/src	90	8	58	180	3	2
remove-examples.js in scripts	9	-	305	305	1	1
verifyPnP.js in scripts	65	-	52	316	7	1
resolver.ts in packages/jest-resolve/src	726	28	46	322	10	3
utils.ts in packages/jest-resolve/src	152	1	46	322	5	1
interpolation.ts in packages/jest-each/src/table	68	3	46	342	4	3
docusaurusTheme.css in website/src/css	63	-	173	359	2	2
algoliaDocSearchTheme.css in website/src/css	28	-	359	359	1	1
videos.module.css in website/src/pages	10	-	359	359	1	1
requireOrImportModule.ts in packages/jest-util/src	45	1	58	395	5	2
index.js in website/src/pages	383	6	43	400	7	6
docusaurus.config.js in website	276	2	41	400	13	7
legacyCSS.css in website/src/components/v1	213	-	400	400	1	1
_landingAnimation.js in website/src/pages/animations	187	10	46	400	2	2
videos.js in website/src/pages	108	2	359	400	2	2
GridBlock.js in website/src/components/v1	76	4	400	400	1	1
help.js in website/src/pages	73	1	219	400	3	3
versions.js in website/src/pages	65	1	46	400	4	3
themeDark.js in website/src/prism	53	-	400	400	1	1
themeLight.js in website/src/prism	50	-	400	400	1	1
i18n.js in website	45	-	350	400	2	2
MarkdownBlock.js in website/src/components/v1	31	1	61	400	2	2
Container.js in website/src/components/v1	30	1	400	400	1	1
netlify.toml in root	21	-	65	400	6	2
FailedTestsInteractiveMode.ts in packages/jest-core/src	149	9	46	421	2	2
FailedTestsInteractive.ts in packages/jest-core/src/plugins	77	1	421	421	1	1
PriorityQueue.ts in packages/jest-worker/src	97	-	65	475	2	2
FifoQueue.ts in packages/jest-worker/src	67	-	65	475	3	3
NodeWatcher.js in packages/jest-haste-map/src/watchers	219	18	46	496	2	1
WatchmanWatcher.js in packages/jest-haste-map/src/watchers	206	14	496	496	1	1
FSEventsWatcher.ts in packages/jest-haste-map/src/watchers	143	7	65	496	3	1
common.js in packages/jest-haste-map/src/watchers	59	4	494	496	2	1
RecrawlWarning.js in packages/jest-haste-map/src/watchers	43	3	339	496	3	1
runtime-cli.ts in packages/jest-repl/src/cli	113	1	46	516	12	7
version.ts in packages/jest-repl/src/cli	1	-	516	516	1	1

Most Recently Changed Files (Top 50)

File	# lines	# units	last modified (days ago)	created (days ago)	# changes	# contributors
GitHubActionsReporter.ts in packages/jest-reporters/src	40	2	16	16	1	1
index.ts in packages/jest-reporters/src	36	-	16	1139	9	6
index.ts in packages/jest-mock/src	978	30	17	1160	37	19
ScriptTransformer.ts in packages/jest-transform/src	807	25	17	1153	56	20
args.ts in packages/jest-cli/src/cli	680	1	17	1137	32	17
ValidConfig.ts in packages/jest-config/src	159	3	17	1144	29	20
Descriptions.ts in packages/jest-config/src	92	-	17	1144	10	8
index.ts in packages/jest-environment/src	88	-	17	1145	37	15
Defaults.ts in packages/jest-config/src	82	1	17	1144	22	13
questions.ts in packages/jest-cli/src/init	50	-	17	1137	6	5
spyMatchers.ts in packages/expect/src	1001	30	21	1150	21	7
jasmineUtils.ts in packages/expect-utils/src	180	9	21	65	2	2
legacyFakeTimers.ts in packages/jest-fake-timers/src	442	17	22	712	19	8
PatternPrompt.ts in packages/jest-watcher/src	44	1	24	1160	11	2
TestNamePatternPrompt.ts in packages/jest-core/src	21	3	24	1140	8	4
TestPathPatternPrompt.ts in packages/jest-core/src	21	3	24	1140	8	4
index.ts in packages/jest-environment-node/src	116	5	39	1144	27	13
normalize.ts in packages/jest-config/src	1048	27	40	1144	62	28
Config.ts in packages/jest-types/src	449	-	40	1161	63	37
index.ts in packages/jest-config/src	312	2	40	1144	35	20
runJest.ts in packages/jest-core/src	256	2	40	1140	34	12
parseShardPair.ts in packages/jest-config/src	31	-	40	40	1	1
docusaurus.config.js in website	276	2	41	400	13	7
index.js in website/src/pages	383	6	43	400	7	6
index.ts in packages/jest-runtime/src	1950	58	44	1145	107	40
SearchSource.ts in packages/jest-core/src	316	18	44	1140	23	10
reporter.ts in packages/jest-jasmine2/src	141	3	45	1137	10	6
array.ts in packages/jest-each/src/table	72	1	45	1140	12	5
index.ts in packages/jest-haste-map/src	869	22	46	1158	46	17
matchers.ts in packages/expect/src	821	19	46	1150	35	14
resolver.ts in packages/jest-resolve/src	726	28	46	322	10	3
Env.ts in packages/jest-jasmine2/src/jasmine	586	62	46	1137	29	10
watch.ts in packages/jest-core/src	506	1	46	1140	22	9
index.ts in packages/jest-matcher-utils/src	466	3	46	1162	28	8
index.ts in packages/pretty-format/src	465	19	46	1164	28	13
index.ts in packages/jest-snapshot/src	430	7	46	1154	40	13
TestScheduler.ts in packages/jest-core/src	423	10	46	1140	33	11
toThrowMatchers.ts in packages/expect/src	394	3	46	1150	15	4
utils.ts in packages/jest-circus/src	393	7	46	1148	30	14
index.ts in packages/expect/src	374	4	46	1150	27	10
index.ts in packages/jest-message-util/src	313	2	46	1161	31	9
runTest.ts in packages/jest-runner/src	310	2	46	1145	54	21
index.ts in packages/babel-plugin-jest-hoist/src	309	8	46	1154	26	7
utils.ts in packages/jest-reporters/src	288	-	46	1139	16	7
printSnapshot.ts in packages/jest-snapshot/src	261	-	46	907	20	4
asymmetricMatchers.ts in packages/expect/src	250	29	46	1150	19	8
jestAdapterInit.ts in packages/jest-circus/src/legacy-code-todo-rewrite	245	1	46	1148	35	15
joinAlignedDiffs.ts in packages/jest-diff/src	245	-	46	1037	9	3
ModuleMap.ts in packages/jest-haste-map/src	224	9	46	1158	16	6
NodeWatcher.js in packages/jest-haste-map/src/watchers	219	18	46	496	2	1