1 | initial version |

I think the best way to track time across subprocesses is to use the `cputime`

command in Sage. It takes a keyword arguments `subprocesses=True`

which will try to track the time spent in subprocesses.

```
sage: t = cputime(subprocesses=True);
sage: integrate(sin(log(x))^2, x)
-1/5*x*sin(2*log(x)) - 1/10*x*cos(2*log(x)) + 1/2*x
sage: cputime(subprocesses=True) - t
0.13
```

Compare this with the non- `subprocesses=True`

version:

```
sage: t = cputime();
sage: integrate(sin(log(x))^2, x)
-1/5*x*sin(2*log(x)) - 1/10*x*cos(2*log(x)) + 1/2*x
sage: cputime() - t
0.0099999999999997868
```

This currently works by using thing `cputime`

method on expect interface objects.

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