flutter / engine
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: 2189
  • Daily file updates (only one update per file and date counted): 26820
  • First update: 2013-04-23
  • Latest update: 2022-02-02
  • Days between first and latest update: 3208 (458 weeks, estimated 2290 working days)
  • Active days (at least one file change): 2399
  • Data:
File Change History Overall
File Age Distribution Overall
Days since first update
  • There are 2,189 files with 268,961 lines of code in files.
    • 1,586 files that are 366+ days old (201,381 lines of code)
    • 338 files that are 181-365 days old (35,189 lines of code)
    • 155 files that are 91-180 days old (12,273 lines of code)
    • 63 files that are 31-90 days old (14,878 lines of code)
    • 47 files that are 1-30 days old (5,240 lines of code)
74% | 13% | 4% | 5% | 1%
Legend:
366+
181-365
91-180
31-90
1-30
Latest Change Distribution Overall
Days since last update
  • There are 2,189 files with 268,961 lines of code in files.
    • 479 files have been last changed 366+ days ago (19,497 lines of code)
    • 545 files have been last changed 181-365 days ago (45,133 lines of code)
    • 402 files have been last changed 91-180 days ago (39,608 lines of code)
    • 409 files have been last changed 31-90 days ago (72,856 lines of code)
    • 354 files have been last changed 1-30 days ago (91,867 lines of code)
7% | 16% | 14% | 27% | 34%
Legend:
366+
181-365
91-180
31-90
1-30
File Change History per File Extension
h, cc, dart, java, mm, gn, py, yaml, gni, glsl, cpp, md, m, sh, gitignore, json, xml, plist, txt, gradle, properties, bat, svg, html, clang-format, yml, c, css, pro, storyboard, gitattributes, podspec, patch, clang-tidy
File Age Distribution per Extension
Days since first update
366+
181-365
91-180
31-90
1-30
cc69% | 14% | 5% | 9% | <1%
dart81% | 8% | 1% | 2% | 6%
h69% | 13% | 6% | 9% | 1%
java98% | <1% | <1% | 0% | 0%
mm67% | 30% | <1% | <1% | <1%
gn89% | 6% | 2% | 1% | <1%
py58% | 19% | 17% | 0% | 4%
m91% | 8% | 0% | 0% | 0%
gni36% | 4% | 59% | 0% | 0%
yaml86% | 12% | <1% | 0% | 0%
html100% | 0% | 0% | 0% | 0%
css100% | 0% | 0% | 0% | 0%
c66% | 33% | 0% | 0% | 0%
Latest Change Distribution per Extension
Days since last update
366+
181-365
91-180
31-90
1-30
cc10% | 16% | 16% | 21% | 35%
h16% | 16% | 15% | 26% | 25%
java4% | 16% | 18% | 18% | 42%
m40% | 7% | 3% | 35% | 12%
mm2% | 10% | 4% | 40% | 41%
dart<1% | 20% | 10% | 36% | 31%
gn5% | 8% | 18% | 16% | 52%
gni5% | 6% | 59% | 18% | 10%
yaml4% | 32% | 24% | 2% | 36%
html100% | 0% | 0% | 0% | 0%
css100% | 0% | 0% | 0% | 0%
c66% | 33% | 0% | 0% | 0%
py<1% | 38% | 37% | 6% | 16%
File Change History per Logical Decomposition
primary
primary (file age distribution)
Days since first update
366+
181-365
91-180
31-90
1-30
shell72% | 18% | 5% | 2% | <1%
lib82% | 7% | <1% | 2% | 6%
fml94% | 4% | <1% | <1% | <1%
flow87% | 10% | <1% | 0% | <1%
tools62% | 10% | 26% | 0% | <1%
testing85% | 11% | 2% | 0% | 0%
runtime98% | 1% | 0% | 0% | 0%
vulkan100% | 0% | 0% | 0% | 0%
web_sdk81% | 0% | 0% | 18% | 0%
common100% | 0% | 0% | 0% | 0%
build85% | 8% | 0% | 0% | 5%
sky92% | 0% | 0% | 0% | 7%
ROOT100% | 0% | 0% | 0% | 0%
assets100% | 0% | 0% | 0% | 0%
flutter_frontend_server100% | 0% | 0% | 0% | 0%
benchmarking83% | 0% | 0% | 0% | 16%
ci25% | 74% | 0% | 0% | 0%
display_list0% | 0% | 0% | 98% | 1%
primary (latest change distribution)
Days since last update
366+
181-365
91-180
31-90
1-30
shell7% | 15% | 15% | 23% | 37%
fml27% | 20% | 17% | 15% | 19%
lib3% | 20% | 11% | 33% | 30%
testing19% | 25% | 15% | 32% | 7%
runtime17% | 6% | 5% | 24% | 45%
flow6% | 14% | 24% | 30% | 23%
vulkan15% | 2% | 0% | 26% | 54%
common14% | 0% | 41% | 23% | 20%
tools1% | 15% | 34% | 40% | 8%
web_sdk1% | 7% | 0% | 31% | 59%
sky2% | 55% | 29% | 0% | 13%
assets5% | 94% | 0% | 0% | 0%
ci<1% | 25% | 74% | 0% | 0%
build0% | 32% | 22% | 39% | 5%
ROOT0% | 41% | 0% | 0% | 58%
flutter_frontend_server0% | 36% | 6% | 0% | 57%
benchmarking0% | 20% | 0% | 24% | 54%
display_list0% | 0% | 0% | 25% | 74%
Oldest Files (Top 20)
File# lines# unitslast modified
(days ago)		created
(days ago)		# changes
gn
BUILD.gn
in root
 186 - 16 2661 195
gn
BUILD.gn
in shell
 3 - 555 2562 34
gn
BUILD.gn
in testing
 178 - 2 2395 47
roll.py
in sky/tools/roll
 129 2 188 2395 26
patch.py
in sky/tools/roll
 22 2 188 2395 7
utils.py
in sky/tools/roll
 20 4 188 2395 4
gn
BUILD.gn
in sky
 7 - 570 2395 45
gn
BUILD.gn
in sky/packages/sky_engine
 213 - 168 2388 60
pubspec.yaml
in sky/packages/sky_engine
 7 - 455 2388 90
gn
BUILD.gn
in sky/packages
 4 - 211 2388 10
raster_cache.cc
in flow
 394 27 2 2214 108
instrumentation.cc
in flow
 177 11 6 2214 24
gn
BUILD.gn
in flow
 170 - 8 2214 106
raster_cache.h
in flow
 165 9 2 2214 65
instrumentation.h
in flow
 54 - 6 2214 18
layer.h
in flow/layers
 186 13 51 2196 94
container_layer.cc
in flow/layers
 168 12 51 2196 49
layer_tree.cc
in flow/layers
 126 3 8 2196 86
picture_layer.cc
in flow/layers
 125 6 51 2196 68
performance_overlay_layer.cc
in flow/layers
 93 4 94 2196 37
Files Not Recently Changed (Top 20)
File# lines# unitslast modified
(days ago)		created
(days ago)		# changes
_empty.dart
in sky/packages/sky_engine/lib
 1 - 1764 1764 1
embedder_include.c
in shell/platform/embedder
 1 - 1185 1626 2
empty_main.dart
in shell/testing/observatory
 2 1 1185 1960 3
scoped_nsobject.mm
in fml/platform/darwin
 3 - 1185 1780 2
cf_utils.cc
in fml/platform/darwin
 3 - 1185 1808 2
scoped_block.mm
in fml/platform/darwin
 3 - 1185 1780 2
log_settings_state.cc
in fml
 6 - 1185 1358 2
errors_win.h
in fml/platform/win
 7 - 1185 1227 2
snapshot.h
in lib/snapshot
 9 - 1185 1760 4
paths_android.h
in fml/platform/android
 10 - 1185 1227 2
gni
embedder.gni
in shell/platform/embedder
 12 - 1185 1262 2
time_delta_unittest.cc
in fml/time
 13 - 1185 1358 2
weak_ptr_internal.cc
in fml/memory
 14 1 1185 1557 3
count_down_latch.cc
in fml/synchronization
 18 2 1185 1205 2
log_level.h
in fml
 19 - 1185 1358 3
weak_ptr_internal.h
in fml/memory
 19 1 1185 1557 4
vulkan_native_surface.h
in vulkan
 20 - 1185 1841 5
ref_ptr_internal.h
in fml/memory
 21 1 1185 1384 2
jni_weak_ref.h
in fml/platform/android
 24 1 1185 1782 2
macros.h
in fml
 25 - 1185 1396 6
Most Recently Created Files (Top 20)
File# lines# unitslast modified
(days ago)		created
(days ago)		# changes
embedder_surface_vulkan.cc
in shell/platform/embedder
 118 6 2 2 1
embedder_surface_vulkan.h
in shell/platform/embedder
 62 - 2 2 1
display_list_complexity.h
in display_list
 30 2 2 2 1
display_list_complexity.cc
in display_list
 24 - 2 2 1
download_fuchsia_sdk.py
in tools
 104 6 4 7 2
endianness.h
in fml
 49 3 4 7 2
endianness_unittests.cc
in fml
 27 - 4 7 2
endianness.cc
in fml
 1 - 7 7 1
instrumentation_unittests.cc
in flow
 34 - 8 8 1
create_macos_framework.py
in sky/tools
 58 2 10 11 2
FlutterPlatformViewController.mm
in shell/platform/darwin/macos/framework/Source
 90 - 13 15 2
FlutterPlatformViewControllerTest.mm
in shell/platform/darwin/macos/framework/Source
 86 - 15 15 1
FlutterPlatformViewController.h
in shell/platform/darwin/macos/framework/Source
 18 - 15 15 1
TestFlutterPlatformView.mm
in shell/platform/darwin/macos/framework/Source
 17 - 13 15 2
FlutterPlatformViews.h
in shell/platform/darwin/macos/framework/Headers
 11 - 13 15 2
TestFlutterPlatformView.h
in shell/platform/darwin/macos/framework/Source
 6 - 15 15 1
display_list_benchmarks_canvas_provider.h
in display_list
 40 1 16 16 1
display_list_benchmarks_metal.h
in display_list
 22 1 16 16 1
display_list_benchmarks_gl.h
in display_list
 22 1 16 16 1
display_list_benchmarks_software.h
in display_list
 20 2 16 16 1
Most Recently Changed Files (Top 20)
File# lines# unitslast modified
(days ago)		created
(days ago)		# changes
display_list_canvas_unittests.cc
in display_list
 2646 65 2 45 4
embedder.cc
in shell/platform/embedder
 2179 62 2 1626 140
display_list_unittests.cc
in display_list
 1387 38 2 45 4
keyboard_win32_unittests.cc
in shell/platform/windows
 1217 30 2 51 8
embedder.h
in shell/platform/embedder
 952 - 2 1626 93
window_win32.cc
in shell/platform/windows
 439 27 2 341 16
vulkan_swapchain.cc
in vulkan
 417 8 2 1841 23
raster_cache_unittests.cc
in flow
 410 5 2 1705 30
raster_cache.cc
in flow
 394 27 2 2214 108
gn
BUILD.gn
in shell/platform/embedder
 369 - 2 1626 88
keyboard_manager_win32.cc
in shell/platform/windows
 310 16 2 51 5
vulkan_device.cc
in vulkan
 306 13 2 1841 35
flutter_window_win32_unittests.cc
in shell/platform/windows
 295 8 2 341 20
vulkan_window.cc
in vulkan
 183 6 2 1967 23
vulkan_proc_table.cc
in vulkan
 182 13 2 1967 29
gn
BUILD.gn
in testing
 178 - 2 2395 47
display_list.cc
in display_list
 166 6 2 45 3
raster_cache.h
in flow
 165 9 2 2214 65
display_list.h
in display_list
 149 5 2 45 3
vulkan_proc_table.h
in vulkan
 128 3 2 1967 26