> it all depends on the requirement whether to use read / f.read....

Of course it depends on the requirements.
If you do F.READ for the same file and same ID many times - yes, it's
faster than READ.
But if you read entire file one ID by another - F.READ is much slower
than READ, because records are not in cache and it takes time to check
the cache for the record.
And cache is also limited to 500 records (as I remember). And if you
read hunders of thousands of records - cache does not help you very
much.
It's usefull when same records are read over and over again.



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