facebook / folly
File Age

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: 1168
  • Daily file updates (only one update per file and date counted): 3246
  • First update: 2012-05-03
  • Latest update: 2022-03-31
  • Days between first and latest update: 3620 (517 weeks, estimated 2585 working days)
  • Active days (at least one file change): 2782
  • Data:
File Change History Overall
File Age Distribution Overall
Days since first update
  • There are 1,168 files with 179,081 lines of code in files.
    • 1,083 files that are 366+ days old (168,704 lines of code)
    • 50 files that are 181-365 days old (5,358 lines of code)
    • 10 files that are 91-180 days old (382 lines of code)
    • 14 files that are 31-90 days old (2,386 lines of code)
    • 11 files that are 1-30 days old (2,251 lines of code)
94% | 2% | <1% | 1% | 1%
Legend:
366+
181-365
91-180
31-90
1-30

explore: zoomable circles
Latest Change Distribution Overall
Days since last update
  • There are 1,168 files with 179,081 lines of code in files.
    • 20 files have been last changed 366+ days ago (1,790 lines of code)
    • 4 files have been last changed 181-365 days ago (549 lines of code)
    • 927 files have been last changed 91-180 days ago (108,097 lines of code)
    • 182 files have been last changed 31-90 days ago (60,399 lines of code)
    • 35 files have been last changed 1-30 days ago (8,246 lines of code)
<1% | <1% | 60% | 33% | 4%
Legend:
366+
181-365
91-180
31-90
1-30

explore: zoomable circles
File Change History per File Extension
cpp, h, py, md, cmake, pxd, pyx, sh, yml, txt, gitignore, pyi, in, svg, clang-format, s, css, bat, json, yaml, c, gdb, rb
File Age Distribution per Extension
Days since first update
366+
181-365
91-180
31-90
1-30
h93% | 3% | <1% | 1% | <1%
cpp94% | 2% | <1% | <1% | 2%
py96% | 0% | 0% | 3% | 0%
cmake99% | <1% | 0% | 0% | 0%
pxd98% | 0% | 0% | 1% | 0%
pyx100% | 0% | 0% | 0% | 0%
c100% | 0% | 0% | 0% | 0%
in100% | 0% | 0% | 0% | 0%
pyi100% | 0% | 0% | 0% | 0%
Latest Change Distribution per Extension
Days since last update
366+
181-365
91-180
31-90
1-30
cmake41% | 8% | 34% | 16% | 0%
cpp<1% | 0% | 61% | 30% | 7%
in100% | 0% | 0% | 0% | 0%
py<1% | 3% | 7% | 85% | 3%
h0% | 0% | 64% | 32% | 3%
pyx0% | 0% | 100% | 0% | 0%
pxd0% | 0% | 74% | 25% | 0%
c0% | 0% | 100% | 0% | 0%
pyi0% | 0% | 100% | 0% | 0%
File Change History per Logical Decomposition
primary
primary (file age distribution)
Days since first update
366+
181-365
91-180
31-90
1-30
folly98% | <1% | <1% | 0% | 1%
folly/experimental83% | 9% | <1% | 1% | 4%
folly/io99% | <1% | 0% | 0% | 0%
build/fbcode_builder96% | <1% | 0% | 3% | 0%
folly/container86% | 0% | 0% | 13% | 0%
folly/synchronization92% | 5% | 0% | 0% | 1%
folly/fibers100% | 0% | 0% | 0% | 0%
folly/futures100% | 0% | 0% | 0% | 0%
folly/logging100% | 0% | 0% | 0% | 0%
folly/concurrency95% | <1% | 0% | 3% | 0%
folly/portability100% | 0% | 0% | 0% | 0%
folly/gen100% | 0% | 0% | 0% | 0%
folly/detail100% | 0% | 0% | 0% | 0%
folly/executors95% | 4% | 0% | 0% | 0%
folly/compression100% | 0% | 0% | 0% | 0%
folly/lang80% | 10% | 3% | 3% | 1%
folly/stats96% | 3% | 0% | 0% | 0%
folly/memory100% | 0% | 0% | 0% | 0%
folly/hash100% | 0% | 0% | 0% | 0%
CMake100% | 0% | 0% | 0% | 0%
folly/net60% | 39% | 0% | 0% | 0%
folly/ssl98% | 1% | 0% | 0% | 0%
folly/python99% | 0% | 0% | <1% | 0%
folly/system81% | 4% | 0% | 14% | 0%
folly/functional100% | 0% | 0% | 0% | 0%
folly/chrono100% | 0% | 0% | 0% | 0%
folly/tracing100% | 0% | 0% | 0% | 0%
folly/support100% | 0% | 0% | 0% | 0%
folly/poly100% | 0% | 0% | 0% | 0%
folly/init100% | 0% | 0% | 0% | 0%
folly/tools100% | 0% | 0% | 0% | 0%
primary (latest change distribution)
Days since last update
366+
181-365
91-180
31-90
1-30
build/fbcode_builder17% | 6% | <1% | 71% | 3%
folly/hash10% | 0% | 62% | 27% | 0%
CMake2% | 0% | 77% | 19% | 0%
folly/experimental0% | 0% | 72% | 18% | 9%
folly0% | 0% | 53% | 39% | 6%
folly/io0% | 0% | 43% | 54% | 2%
folly/container0% | 0% | 83% | 16% | 0%
folly/synchronization0% | 0% | 60% | 26% | 13%
folly/fibers0% | 0% | 84% | 15% | 0%
folly/portability0% | 0% | 87% | 12% | 0%
folly/logging0% | 0% | 74% | 23% | 1%
folly/detail0% | 0% | 88% | 11% | 0%
folly/concurrency0% | 0% | 61% | 38% | 0%
folly/compression0% | 0% | 96% | 3% | 0%
folly/futures0% | 0% | 41% | 58% | 0%
folly/executors0% | 0% | 53% | 46% | 0%
folly/gen0% | 0% | 53% | 46% | 0%
folly/memory0% | 0% | 100% | 0% | 0%
folly/stats0% | 0% | 82% | 17% | 0%
folly/net0% | 0% | 54% | 21% | 23%
folly/lang0% | 0% | 32% | 65% | 1%
folly/ssl0% | 0% | 76% | 23% | 0%
folly/python0% | 0% | 84% | 15% | 0%
folly/functional0% | 0% | 100% | 0% | 0%
folly/chrono0% | 0% | 100% | 0% | 0%
folly/system0% | 0% | 46% | 53% | 0%
folly/tracing0% | 0% | 89% | 10% | 0%
folly/support0% | 0% | 100% | 0% | 0%
folly/poly0% | 0% | 100% | 0% | 0%
folly/init0% | 0% | 100% | 0% | 0%
folly/tools0% | 0% | 100% | 0% | 0%
Oldest Files (Top 50)
File# lines# unitslast modified
(days ago)		created
(days ago)		# changes# contributors
Range.h
in folly
 1021 103 69 3634 144 65
Benchmark.h
in folly
 306 12 52 3628 61 39
EventCount.h
in folly/experimental
 96 8 106 3620 24 12
FBString.h
in folly
 2018 117 69 3604 157 57
FBVector.h
in folly
 1176 118 63 3604 69 28
1115 130 69 3604 87 46
Conv.h
in folly
 1016 37 57 3604 108 62
1007 90 106 3604 89 47
Format-inl.h
in folly
 875 51 106 3604 64 37
874 133 106 3604 66 32
json.cpp
in folly
 854 54 81 3604 84 50
842 80 106 3604 75 33
Conv.cpp
in folly
 611 13 106 3604 44 25
576 24 30 3604 62 38
532 7 106 3604 35 23
String.cpp
in folly
 531 30 60 3604 64 34
519 55 106 3604 44 23
String-inl.h
in folly
 504 27 22 3604 50 30
Traits.h
in folly
 463 11 22 3604 106 35
dynamic.h
in folly
 449 3 55 3604 65 33
445 - 55 3604 194 61
dynamic.cpp
in folly
 416 18 55 3604 59 31
395 7 106 3604 35 22
395 29 106 3604 39 19
Format.cpp
in folly
 345 14 106 3604 36 22
ThreadLocalDetail.h
in folly/detail
 322 20 55 3604 104 43
276 25 57 3604 48 33
257 29 106 3604 42 28
249 27 106 3604 36 19
Format.h
in folly
 246 11 106 3604 48 31
String.h
in folly
 244 21 106 3604 77 40
220 23 106 3604 41 27
MapUtil.h
in folly
 200 10 106 3604 32 17
TestUtil.cpp
in folly/experimental
 198 12 32 3604 37 18
Bits.h
in folly/experimental
 190 19 66 3604 35 16
FormatArg.h
in folly
 172 9 106 3604 30 14
Random.h
in folly
 170 33 106 3604 32 23
ScopeGuard.h
in folly
 162 15 22 3604 41 23
Random.cpp
in folly
 135 7 55 3604 50 28
TestUtil.h
in folly/experimental
 133 7 32 3604 31 15
116 8 106 3604 27 22
113 10 106 3604 24 14
110 - 106 3604 21 14
109 12 106 3604 23 14
106 4 106 3604 19 10
Unicode.cpp
in folly
 103 2 106 3604 21 14
json.h
in folly
 80 1 106 3604 35 29
75 8 106 3604 18 10
57 7 85 3604 28 15
GroupVarintDetail.h
in folly/detail
 56 2 106 3604 14 8
Files Not Recently Changed (Top 50)
File# lines# unitslast modified
(days ago)		created
(days ago)		# changes# contributors
cmake
FindPCRE.cmake
in build/fbcode_builder/CMake
 11 - 1117 1119 2 2
cmake
FindLibEvent.cmake
in build/fbcode_builder/CMake
 69 - 1103 1119 4 2
cmake
FindGMock.cmake
in build/fbcode_builder/CMake
 71 - 1087 1109 2 2
cmake
FBCMakeParseArgs.cmake
in build/fbcode_builder/CMake
 135 - 970 970 1 1
cmake
FBThriftLibrary.cmake
in build/fbcode_builder/CMake
 72 - 959 959 1 1
cmake
FBBuildOptions.cmake
in build/fbcode_builder/CMake
 13 - 941 945 2 2
cmake
FBThriftPyLibrary.cmake
in build/fbcode_builder/CMake
 100 - 941 959 2 1
cmake
FBPythonTestAddTests.cmake
in build/fbcode_builder/CMake
 54 - 928 928 1 1
cmake
FBPythonBinary.cmake
in build/fbcode_builder/CMake
 646 - 863 970 8 2
38 - 718 1514 5 2
cmake
FBCompilerSettingsMSVC.cmake
in build/fbcode_builder/CMake
 9 - 706 706 1 1
cmake
FBCompilerSettings.cmake
in build/fbcode_builder/CMake
 11 - 706 706 1 1
__init__.py
in build/fbcode_builder/getdeps
 1 - 636 1077 2 2
cmake
FindLibUnwind.cmake
in build/fbcode_builder/CMake
 25 - 605 605 1 1
cmake
FindRe2.cmake
in build/fbcode_builder/CMake
 16 - 589 589 1 1
cmake
FindGflags.cmake
in build/fbcode_builder/CMake
 97 - 583 1119 3 3
in
 10 - 540 1344 3 3
cmake
FindGlog.cmake
in build/fbcode_builder/CMake
 29 - 538 1119 3 3
cmake
FBThriftCppLibrary.cmake
in build/fbcode_builder/CMake
 180 - 519 959 6 5
Crc32cDetail.cpp
in folly/hash/detail
 203 5 430 1645 6 4
cmake
FBCompilerSettingsUnix.cmake
in build/fbcode_builder/CMake
 7 - 360 706 2 1
cmake
FindSodium.cmake
in build/fbcode_builder/CMake
 265 - 317 526 2 2
cmake
FindZstd.cmake
in build/fbcode_builder/CMake
 34 - 280 280 1 1
make_fbpy_archive.py
in build/fbcode_builder/CMake
 243 13 280 970 3 2
fb_py_win_main.c
in build/fbcode_builder/CMake
 74 3 178 878 6 4
ChecksumDetail.cpp
in folly/hash/detail
 84 2 163 1645 5 4
Bits.h
in folly
 1 - 106 3604 53 23
1 - 106 2470 21 8
RWSpinLock.h
in folly
 1 - 106 3604 42 26
Hash.h
in folly
 2 - 106 3604 42 28
Portability.h
in folly/futures
 2 - 106 1121 4 2
FiberManager.h
in folly/fibers
 3 - 106 2157 10 6
pxd
cast.pxd
in folly/python
 3 - 106 868 2 2
pxd
memory.pxd
in folly/python
 3 - 106 539 2 2
Libunwind.h
in folly/portability
 4 - 106 374 2 2
HardwareConcurrency.h
in folly/system
 4 - 106 889 2 2
WaitOptions.cpp
in folly/synchronization
 4 - 106 1561 3 2
Try.cpp
in folly
 4 - 106 1726 4 3
5 - 106 338 2 2
Pid.h
in folly/system
 5 - 106 584 2 2
5 - 106 248 2 2
pxd
function.pxd
in folly/python
 5 - 106 878 2 2
HazptrThreadPoolExecutor.h
in folly/synchronization
 5 - 106 833 3 2
InitWeak.cpp
in folly/logging
 6 - 106 1445 3 2
lib.cpp
in folly/logging/example
 6 - 106 1445 4 3
ThreadId.h
in folly/system
 6 - 106 1637 9 7
Sleeper.cpp
in folly/synchronization/detail
 6 - 106 569 2 2
Promise.cpp
in folly/futures
 6 - 106 647 2 2
SharedPromise.cpp
in folly/futures
 6 - 106 647 2 2
DoubleRadixSort.h
in folly/stats/detail
 7 - 106 1339 3 2
Most Recently Created Files (Top 50)
File# lines# unitslast modified
(days ago)		created
(days ago)		# changes# contributors
437 37 15 15 1 1
38 2 22 22 1 1
ThreadCachedReaders.h
in folly/synchronization/detail
 120 11 24 24 1 1
DwarfLineNumberVM.cpp
in folly/experimental/symbolizer
 518 11 30 30 1 1
DwarfImpl.cpp
in folly/experimental/symbolizer
 516 8 30 30 1 1
DwarfUtil.cpp
in folly/experimental/symbolizer
 351 15 30 30 1 1
DwarfUtil.h
in folly/experimental/symbolizer
 103 1 30 30 1 1
DwarfLineNumberVM.h
in folly/experimental/symbolizer
 75 - 30 30 1 1
DwarfImpl.h
in folly/experimental/symbolizer
 53 - 30 30 1 1
DwarfSection.cpp
in folly/experimental/symbolizer
 22 1 30 30 1 1
DwarfSection.h
in folly/experimental/symbolizer
 18 1 30 30 1 1
ThreadCachedSynchronized.h
in folly/concurrency
 150 16 31 31 1 1
Access.h
in folly/lang
 8 - 34 34 1 1
pxd
fbstring.pxd
in folly/python
 5 - 51 51 1 1
MultiplexChannel-inl.h
in folly/experimental/channels
 369 25 54 54 1 1
MultiplexChannel.h
in folly/experimental/channels
 75 1 54 54 1 1
FunctionTraits.h
in folly/experimental/channels/detail
 57 - 54 54 1 1
MultiplexerTraits.h
in folly/experimental/channels/detail
 30 - 54 54 1 1
OnClosedException.h
in folly/experimental/channels
 11 - 54 54 1 1
AtFork.cpp
in folly/system
 126 7 53 55 3 1
AtFork.h
in folly/system
 16 - 54 55 2 1
heap_vector_types.h
in folly/container
 1139 92 36 67 3 3
cargo.py
in build/fbcode_builder/getdeps
 295 17 56 74 5 3
Hint-inl.h
in folly/lang
 83 10 80 80 1 1
Hint.h
in folly/lang
 22 - 80 80 1 1
6 - 100 100 1 1
5 - 100 100 1 1
New.h
in folly/lang
 85 4 49 118 4 2
RateLimiter.cpp
in folly/experimental/channels
 43 2 106 119 2 2
RateLimiter.h
in folly/experimental/channels
 38 - 106 119 2 2
SmartExceptionStackTraceHooks.cpp
in folly/experimental/exception_tracer
 60 2 106 126 2 2
SmartExceptionTracerSingleton.cpp
in folly/experimental/exception_tracer
 17 2 106 126 2 2
SmartExceptionTracerSingleton.h
in folly/experimental/exception_tracer
 16 - 106 126 2 2
BoundedQueue.h
in folly/experimental/coro
 84 9 106 163 2 2
Badge.h
in folly/lang
 28 4 106 172 7 3
ScopeExit.h
in folly/experimental/coro
 167 15 106 183 2 2
DigestBuilder-inl.h
in folly/stats
 58 2 106 183 4 3
DigestBuilder.h
in folly/stats
 36 1 106 183 4 3
RelaxedAtomic.h
in folly/synchronization
 257 24 31 199 4 2
Coinflip.h
in folly/experimental
 63 6 60 220 3 3
40 3 106 248 2 2
5 - 106 248 2 2
FanoutSender-inl.h
in folly/experimental/channels
 163 8 54 252 5 3
PointerVariant.h
in folly/experimental/channels/detail
 52 5 106 252 3 3
FanoutSender.h
in folly/experimental/channels
 33 1 54 252 5 3
QueueObserver.h
in folly/executors
 56 3 80 253 3 4
QueueObserver.cpp
in folly/executors
 41 4 80 253 4 4
15 - 106 267 2 2
cmake
FindZstd.cmake
in build/fbcode_builder/CMake
 34 - 280 280 1 1
Transform-inl.h
in folly/experimental/channels
 476 25 54 289 6 3
Most Recently Changed Files (Top 50)
File# lines# unitslast modified
(days ago)		created
(days ago)		# changes# contributors
437 37 15 15 1 1
StandardLogHandler.cpp
in folly/logging
 36 3 15 1445 9 6
LogWriter.h
in folly/logging
 22 3 15 1445 5 4
Elf.cpp
in folly/experimental/symbolizer
 343 11 16 3515 45 21
Elf.h
in folly/experimental/symbolizer
 165 4 16 3515 44 22
UnboundedQueue.h
in folly/experimental/coro
 43 7 16 794 7 7
OpenSSLTransportCertificate.h
in folly/io/async/ssl
 16 1 17 345 6 3
IOBufQueue.cpp
in folly/io
 367 21 18 3378 39 21
Utility.h
in folly
 285 13 21 1933 56 15
String-inl.h
in folly
 504 27 22 3604 50 30
Traits.h
in folly
 463 11 22 3604 106 35
AtomicUtil-inl.h
in folly/synchronization
 366 31 22 1308 27 9
ScopeGuard.h
in folly
 162 15 22 3604 41 23
38 2 22 22 1 1
15 - 22 1488 10 4
Lock.h
in folly/synchronization
 623 50 23 694 12 4
TcpInfo.cpp
in folly/net
 495 34 23 301 7 3
SSLOptions.h
in folly/io/async
 149 11 23 1732 14 7
ThreadCachedReaders.h
in folly/synchronization/detail
 120 11 24 24 1 1
66 - 24 2304 18 11
JemallocHugePageAllocator.cpp
in folly/experimental
 276 13 28 1305 20 11
dyndeps.py
in build/fbcode_builder/getdeps
 309 34 29 1016 16 6
576 24 30 3604 62 38
DwarfLineNumberVM.cpp
in folly/experimental/symbolizer
 518 11 30 30 1 1
DwarfImpl.cpp
in folly/experimental/symbolizer
 516 8 30 30 1 1
Symbolizer.cpp
in folly/experimental/symbolizer
 394 16 30 3515 76 30
DwarfUtil.cpp
in folly/experimental/symbolizer
 351 15 30 30 1 1
Symbolizer.h
in folly/experimental/symbolizer
 152 13 30 3515 61 20
Dwarf.cpp
in folly/experimental/symbolizer
 141 4 30 3515 58 29
DwarfUtil.h
in folly/experimental/symbolizer
 103 1 30 30 1 1
DwarfLineNumberVM.h
in folly/experimental/symbolizer
 75 - 30 30 1 1
DwarfImpl.h
in folly/experimental/symbolizer
 53 - 30 30 1 1
Dwarf.h
in folly/experimental/symbolizer
 27 1 30 3515 41 17
DwarfSection.cpp
in folly/experimental/symbolizer
 22 1 30 30 1 1
DwarfSection.h
in folly/experimental/symbolizer
 18 1 30 30 1 1
Merge-inl.h
in folly/experimental/coro
 268 9 31 955 13 9
RelaxedAtomic.h
in folly/synchronization
 257 24 31 199 4 2
Exception.h
in folly/lang
 183 4 31 1511 20 4
LockFreeRingBuffer.h
in folly/experimental
 179 22 31 2513 30 14
ThreadCachedSynchronized.h
in folly/concurrency
 150 16 31 31 1 1
89 9 31 854 6 4
ScopedEventBaseThread.h
in folly/io/async
 48 5 31 2479 23 14
getdeps.py
in build/fbcode_builder
 993 41 32 1077 61 20
EventBase.cpp
in folly/io/async
 657 50 32 2956 143 56
fetcher.py
in build/fbcode_builder/getdeps
 550 59 32 1077 27 12
manifest.py
in build/fbcode_builder/getdeps
 548 29 32 1077 43 18
EventBase.h
in folly/io/async
 409 33 32 2956 129 55
Collect.h
in folly/experimental/coro
 229 13 32 1123 24 11
TestUtil.cpp
in folly/experimental
 198 12 32 3604 37 18
Promise.h
in folly/experimental/coro
 173 12 32 1502 9 7