Extra requests being sent during benchmark

[shark-h]

I was running a benchmark for Hasura Pro -
set it to 10 reqs/second and time to 1 second, resulted in 20 requests (should have been 10 requests)
set it to 10 reqs/second and time to 5 seconds, resulted in 81 requests (should have been 50)

The request count is taken from Pro metrics.

There was a warmup time set initially, which I removed and then got these results.