facebookexperimental / skybison
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 9,939 units with 97,105 lines of code in units (45.5% of code).
    • 42 very long units (6,445 lines of code)
    • 184 long units (12,216 lines of code)
    • 906 medium size units (27,760 lines of code)
    • 1,418 small units (21,027 lines of code)
    • 7,389 very small units (29,657 lines of code)
6% | 12% | 28% | 21% | 30%
Legend:
101+
51-100
21-50
11-20
1-10
Unit Size per Extension
101+
51-100
21-50
11-20
1-10
cpp8% | 16% | 32% | 23% | 19%
py4% | 8% | 24% | 20% | 43%
h0% | 0% | 5% | 8% | 86%
Unit Size per Logical Component
primary logical decomposition
101+
51-100
21-50
11-20
1-10
runtime7% | 15% | 31% | 21% | 24%
library3% | 8% | 24% | 17% | 45%
ext/Python17% | 18% | 20% | 18% | 24%
util22% | 12% | 22% | 19% | 22%
ext/Objects5% | 13% | 28% | 28% | 23%
ext/Modules36% | 0% | 14% | 14% | 34%
benchmarks/benchmarks5% | 2% | 25% | 29% | 36%
library/compiler1% | 5% | 25% | 21% | 45%
library/asyncio0% | 33% | 16% | 22% | 27%
library/distutils0% | 43% | 12% | 27% | 16%
ext/Internal0% | 7% | 37% | 29% | 25%
benchmarks0% | 0% | 35% | 31% | 33%
library/collections0% | 0% | 20% | 39% | 39%
library/__static__0% | 0% | 18% | 9% | 71%
library/json0% | 0% | 0% | 79% | 20%
ROOT0% | 0% | 0% | 57% | 42%
library/encodings0% | 0% | 0% | 0% | 100%
capi0% | 0% | 0% | 0% | 100%
Alternative Visuals
Longest Units
Top 50 longest units
Unit# linesMcCabe index# params
556 165 2
309 101 1
308 103 1
258 82 4
199 54 6
187 84 3
185 21 2
183 57 2
170 43 8
169 46 2
160 43 7
152 66 3
151 38 5
150 31 2
147 39 5
142 26 3
137 47 5
136 40 3
132 126 1
131 23 5
129 50 6
125 21 3
125 41 1
124 6 2
123 42 4
122 1 0
121 27 2
116 21 3
115 28 5
111 25 4
110 27 1
110 67 5
110 25 3
109 20 2
106 28 2
106 25 5
105 21 2
105 7 1
104 42 4
103 25 5
103 25 2
101 31 4
98 21 6
98 26 2
97 27 2
97 23 2
97 31 7
96 23 3
95 24 2
94 9 1