facebook / proxygen
Unit Size

The distribution of size of units (measured in lines of code).

Intro
  • Unit size measurements show the distribution of size of units of code (methods, functions...).
  • Units are classified in four categories based on their size (lines of code): 1-20 (small units), 20-50 (medium size units), 51-100 (long units), 101+ (very long units).
  • You should aim at keeping units small (< 20 lines). Long units may become "bloaters", code that have increased to such gargantuan proportions that they are hard to work with.
Learn more...
Unit Size Overall
  • There are 3,654 units with 34,677 lines of code in units (63.0% of code).
    • 9 very long units (1,218 lines of code)
    • 49 long units (3,213 lines of code)
    • 357 medium size units (10,926 lines of code)
    • 508 small units (7,425 lines of code)
    • 2,731 very small units (11,895 lines of code)
3% | 9% | 31% | 21% | 34%
Legend:
101+
51-100
21-50
11-20
1-10
Unit Size per Extension
101+
51-100
21-50
11-20
1-10
cpp4% | 10% | 37% | 23% | 22%
py2% | 12% | 35% | 22% | 27%
h0% | 1% | 8% | 14% | 75%
c0% | 0% | 100% | 0% | 0%
Unit Size per Logical Component
primary logical decomposition
101+
51-100
21-50
11-20
1-10
proxygen/lib/http4% | 10% | 30% | 22% | 32%
build/fbcode_builder7% | 23% | 29% | 16% | 21%
build/fbcode_builder/getdeps0% | 4% | 38% | 25% | 31%
proxygen/lib/utils0% | 5% | 34% | 18% | 41%
build/fbcode_builder/CMake0% | 9% | 41% | 20% | 28%
proxygen/lib/transport0% | 0% | 42% | 8% | 49%
proxygen/httpserver0% | 0% | 28% | 18% | 52%
proxygen/httpserver/filters0% | 0% | 39% | 14% | 46%
proxygen/lib/pools0% | 0% | 32% | 12% | 55%
proxygen/lib/healthcheck0% | 0% | 82% | 0% | 17%
proxygen/lib/ssl0% | 0% | 14% | 15% | 69%
proxygen/lib/services0% | 0% | 8% | 27% | 63%
proxygen/lib/stats0% | 0% | 10% | 0% | 89%
build0% | 0% | 0% | 100% | 0%
proxygen/lib/sampling0% | 0% | 0% | 16% | 83%
Alternative Visuals
Longest Units
Top 50 longest units
Unit# linesMcCabe index# params
258 93 6
169 49 1
130 37 1
128 13 3
115 17 8
107 28 2
106 22 3
103 19 6
102 28 1
100 27 1
92 18 5
90 32 4
89 21 1
82 18 1
78 19 3
78 1 1
78 7 0
76 25 1
76 20 0
76 25 4
74 17 3
73 22 1
73 19 2
72 8 1
72 15 4
70 19 4
69 15 5
67 13 1
67 18 2
64 17 1
64 17 6
64 1 2
63 7 4
63 10 5
63 18 0
63 1 1
62 22 1
61 24 2
61 25 4
60 24 1
58 19 1
58 17 3
57 13 2
57 15 1
57 1 2
55 18 1
55 9 0
55 16 4
54 13 2
53 13 4