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A difference should be made between exact results for auto-completion/filter and inexact. A colleague complained to me that in most cases it is very dificult for him to look for or use/mention his own profile on many sites, because when he has completely typed his name, auto-complete doesn't kick in. His name is Li. One of the most used names around the ...


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It depends on the specific use case, but there is no agreed-upon minimum number of characters that is required before doing filtering. If too many results can get returned, limit the initial set, preferably to the most likely (if that can be determined), or some other metric like most recent. If you use Chrome, go ahead and try it. Enter a single character ...


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Just a note to add to @merqri answer: you may consider a feature, in which user typing a filter string gets information (it can be an approximation), how many results there are. If the number of results is narrowed down to eg. five, you may show them even after two characters. Take a look at MS Excel autocomplete feature: you have some texts (strings) in ...


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Frankly, this is contextual. For a single word, generally 2-4 letters are kept as minimum to initiate the auto complete feature. There are at least two reasons for this. One being the performance as you pointed out. There is no need to fire up a filtering call when you know that the resultant dataset will be huge. Second being, the number of results you ...


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Would something like this work: The idea is the main circle has up to 3 time minutes displayed to show a quick look of what the different times are for travelling. On click, or perhaps on hover, 3 circles expand out showing the different travelling times for the different modes of transport. This is just an example and would need refining.



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