in reply to Hash tables, are they really what we see?
I did some benchmark for perl hash vs in-memory SQLite several days ago. Number of records that you are interested seems similar with my case, have a look at this thread if you are interested in.
Hash lookup is fast. There are cases in-memory sqlite is better than hash.
Thank you for that nice reference. It was interesting to read your benchmark. If I got to a huge project like that one, I`ll most definitely ask for wisdom.
Wisdom is sometimes useful even if one is not involved in a huge project.
The ISS (or other satellites)
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