facebook / fbthrift
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 16,714 units with 139,214 lines of code in units (55.7% of code).
    • 76 very long units (11,640 lines of code)
    • 228 long units (15,616 lines of code)
    • 1,046 medium size units (31,941 lines of code)
    • 1,887 small units (27,174 lines of code)
    • 13,477 very small units (52,843 lines of code)
8% | 11% | 22% | 19% | 37%
Legend:
101+
51-100
21-50
11-20
1-10
Unit Size per Extension
101+
51-100
21-50
11-20
1-10
cc18% | 23% | 23% | 15% | 17%
cpp11% | 9% | 27% | 23% | 28%
h5% | 5% | 16% | 18% | 52%
php6% | 21% | 26% | 13% | 31%
py1% | 6% | 28% | 23% | 39%
go2% | 7% | 25% | 24% | 40%
java<1% | 4% | 21% | 19% | 53%
rs0% | 8% | 26% | 24% | 39%
rb0% | 89% | 0% | 0% | 10%
pyx0% | 0% | 5% | 13% | 80%
c0% | 0% | 100% | 0% | 0%
pyi0% | 0% | 0% | 10% | 89%
Unit Size per Logical Component
primary logical decomposition
101+
51-100
21-50
11-20
1-10
thrift/compiler17% | 21% | 21% | 16% | 23%
thrift/lib5% | 6% | 23% | 20% | 44%
build/fbcode_builder2% | 11% | 36% | 22% | 28%
thrift/conformance5% | 7% | 10% | 35% | 41%
thrift/perf4% | 16% | 19% | 20% | 39%
thrift/example0% | 0% | 17% | 56% | 25%
build0% | 0% | 0% | 0% | 100%
Alternative Visuals
Longest Units
Top 50 longest units
Unit# linesMcCabe index# params
700 6 1
352 58 1
321 31 1
309 54 3
296 63 5
269 62 4
254 41 4
247 73 2
240 51 5
201 24 1
192 26 3
187 14 1
185 17 1
173 27 0
172 30 5
167 9 3
165 26 5
164 38 3
159 13 2
158 9 2
157 37 4
156 34 4
155 16 4
155 25 4
154 11 1
150 19 6
146 14 2
143 21 1
140 29 4
138 37 4
136 24 2
134 12 0
131 14 4
131 25 3
129 15 2
128 13 3
125 35 1
123 10 1
123 13 3
122 21 3
121 15 4
120 22 3
120 31 4
120 27 4
118 20 1
118 45 0
117 18 2
115 22 6
115 25 2
115 30 8