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Why don't you use a hashmap to check for duplicate links?Pieter B– Pieter B2019-05-08 09:40:44 +00:00Commented May 8, 2019 at 9:40
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It will run out of memory, as there could be a billion links.Lokasa Mawati– Lokasa Mawati2019-05-08 09:43:14 +00:00Commented May 8, 2019 at 9:43
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You need to run a profiler to see why your webcrawler is so slow.Pieter B– Pieter B2019-05-08 09:53:32 +00:00Commented May 8, 2019 at 9:53
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The suggestion of hashmap of the addresses and compiling the database queries into a single call are good ones. If you're finding only a few thousand links and your starting source is something big like stackexchange, then there is probably some other error. You are ensuring that the link is new before going through its own links, right? And you're not pruning too much from the address?user3685427– user36854272019-06-07 13:48:12 +00:00Commented Jun 7, 2019 at 13:48
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