src/tools/clippy/src/docs/slow_vector_initialization.txt

   1 ### What it does
   2 Checks slow zero-filled vector initialization
   3
   4 ### Why is this bad?
   5 These structures are non-idiomatic and less efficient than simply using
   6 `vec![0; len]`.
   7
   8 ### Example
   9 ```
  10 let mut vec1 = Vec::with_capacity(len);
  11 vec1.resize(len, 0);
  12
  13 let mut vec1 = Vec::with_capacity(len);
  14 vec1.resize(vec1.capacity(), 0);
  15
  16 let mut vec2 = Vec::with_capacity(len);
  17 vec2.extend(repeat(0).take(len));
  18 ```
  19
  20 Use instead:
  21 ```
  22 let mut vec1 = vec![0; len];
  23 let mut vec2 = vec![0; len];
  24 ```