| time | name     | event   |
|----: | :--------| :-------|
|    0 | worker 0 | request |
|    0 | worker 0 | start   |
|    1 | worker 1 | request |
|    1 | worker 1 | start   |
|    2 | worker 2 | request |
|    3 | worker 3 | request |
|    3 | worker 0 | done    |
|    3 | worker 2 | start   |
|    4 | worker 1 | done    |
|    4 | worker 3 | start   |
|    6 | worker 2 | done    |
|    7 | worker 3 | done    |
