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Sometimes I'm using a Google service in a few browser tabs, and the Google pages all of a sudden start to load incredibly slow (dozens of seconds to start displaying the pages, such as Google results). A few minutes later, problem's gone (that happens at average, say, once a week or two). If I do a ping google.com during it, the response takes less than 20 or 50 ms (depending on time of day/amount of users in my area).

Why is ping fast, but sites are slow, during these strange moments? Shouldn't ping get slow as well, if that's a traffic problem?

If it's not a traffic problem, what else can it be?

PS: Asked first on Network Engineering, but probably off-topic there, I've been told.

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    Ping isn't a measure of bandwidth. It sounds like your issue a bandwidth issue. – Ramhound May 9 '19 at 13:39
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    @Ramhound If it were bandwidth, the sites would have started to load, which is not the case. – Rodrigo May 9 '19 at 13:45
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    50 ms is less than 1/10 of a second. Your issue isn't connected to high ping times. The fact it took more than a few seconds to load a page is an indication of a bandwidth problem. low ping times are not directly connected fast connections. For example, traditional dial-up had relatively stable ping times, but low bandwidth – Ramhound May 9 '19 at 13:52
  • @Ramhound I understand that ping doesn't measure bandwidth. But if it was a bandwidth problem, the site would start to load, and take all the time (let's say 20 seconds) downloading each piece of the page -- and I would see each piece's name on Firefox status bar (downloading xxx from yyy.google.com, etc). However, all I see on Firefox status bar is "Waiting for Google...", which means nothing is being downloaded. It seems more like a communication problem, a handshake problem or something like that. I hope I made it clear now. – Rodrigo May 9 '19 at 17:16

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