Does anyone know anything about this issue?
I'd try the new 415, available from beta-testing as described in https://www.mql5.com/en/forum/138261. Every build before 415 is supposedly going to get turned off on June 1st, so I wouldn't expend too much energy investigating the speed of 402, 406, 409 etc.
(EDIT: of course, you could probably continue to use any build you like for back-testing, but you won't be able to trade using anything before 415.)
I wonder why no one else is complaining about this issue (backtests became slower). I can't be the only one having this problem, can I?
Looking back, MT4 strategy tester ten-folded it's run times pretty short after MT5 was launched. Isn't Mt5 bringing it's own paid cloud service? What a coincidence!
Why don't you use an old terminal for backtesting?
I for my point have no problems with the tester, even a 10 Year on tick test gets finnished after a max of 1 min.
I wonder why no one else is complaining about this issue (backtests became slower). I can't be the only one having this problem, can I?
Looking back, MT4 strategy tester ten-folded it's run times pretty short after MT5 was launched. Isn't Mt5 bringing it's own paid cloud service? What a coincidence!
@zzueg: I will have to. Problem is, that I will then have to have two development platforms, one for backtesting, one for live-trading since at some point 4xx and 2xx became incompatible.
@RaptorUK: What are you trying to tell me?

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My EA used to take about ~ 4 minutes to optimize but since the 406 update takes ~ 18 minutes.
This is on a live account and demo account with VantageFX and AxisTrader brokers based in Australia.
Is this slow optimization coincidental to the update and something with the brokers or have you found this as well?