This reddit discussion from a few months ago gives insight into how long darksend mixing should/could take:
link:
https://www.reddit.com/r/dashpay/comments/3etq0y/what_is_the_point_of_darksend_mixing_in_the/2d2d2d2aasdasd
In the dashcore wallet it has darksend mixing, it doesnt give any options but says 1000drk/2 rounds, so it will try to mix my balance of 10drk 100x over? or 200x over? Whats the point of this if i can darksend when i send payment?
edit: Its been over 2 hours and only says 8% which it said 20minutes into it, it keeps saying it failed will retry like theres something wrong with the network, is darksend a working feature?
Tungfa:
You can change the mixing settings in " Wallet Preferences"
Mixing makes pre mixed coins available for DS ! For the mixing you need other coins/wallets to be mixing with you, so if nobody is online mixing it will take longer. be patient, DS works
2d2d2d2aasdasd:
Its been running since i made this post and its only at 9%, how patient do i have to be, like 72 hours patient?
Tungfa:
depends on how many coins, how many rounds
what are you doing 1000 Dash / 2 Rounds ? 72 hours definitely
2d2d2d2aasdasd:
I dont even have 1000 dash, i have like $20 worth. Its set at 1000 dash by default but im assuming that means it will mix up to 1000, right, like how could it mix more than there is?
So basically to use dash anonymously i got to leave my computer on for 3 days?