I hate to say this - but doing a straight select like the initial loop you have, and....I get 10,000 selects, all with the SAME date value.... The only way I get any kind of variation is to do 10,000 1-row inserts, and at that point, there are bunches of duplicate times and the jumps in time are a little all over the place (from 13ms to 33ms).
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Your lack of planning does not constitute an emergency on my part...unless you're my manager...or a director and above...or a really loud-spoken end-user..All right - what was my emergency again?