multi-year optimizer runs load price data up to 13x faster

optimizer runs on 1 to 4 minute timeframes over one or two years now load their price data up to 13x faster. a two-year, 2-minute run that took 27 seconds to prepare now takes about 2 seconds.

a request that times out also no longer retries itself four times. before, one slow job could create four copies of itself and hold up the optimizer queue for around eight minutes. timeouts now stop right away, while connection and server errors still retry as before.

both fixes follow the slowdown on november 9, when optimizer jobs took much longer than usual during the US morning session.