perf: Optimize execution speed of dependency analysis

[Stamp9]

improve performance:

• remove all timeouts, and in general be under 2 seconds always
• reduce the median time by 50%, say at 1.1 seconds.

[monperrus]

stats on 163 benchmark today

first run:

Mean: 2.15 seconds
Median: 0.41 seconds
Min: 0.12 seconds
Max: 10.04 seconds
Std Dev: 2.84 seconds

second run:

Total requests: 154
Mean: 1.82 seconds
Median: 0.34 seconds
Min: 0.12 seconds
Max: 10.08 seconds
Std Dev: 2.62 seconds