It depends on what particular VPN service you subscribe to in order to see if it is fast enough for you or not. There are many Singapore VPN service providers you can look up online along with their prices to decide which one you should subscribe to. However, if you see your internet connection being a little bit lousy during peak hours, do not worry about it. It is always better to wait for the page to load than to let your online activity unhidden from all the hackers and snoopers online.
I have noticed this region is fast for south-east Asian users, now that India is no longer an option for us.