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I am creating a program for analyzing and generating queries. I was curious if there currently exists a method within SQLite such that I could query the time taken for a query to process? I am unable to modify my install in any way, so this method needs to work out of the box. I am writing my tool in python, and although I guess I could use the timer class to time execution -this method will not work when I am connecting to remote machines (and return a consistent timing.)
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Query one takes about 30ms, but 150ms to fetch the data from the database. Query two takes about 3ms -this is the one I therefore prefer-, but also takes 170ms to fetch the data.
SQLite provides the ability for advanced programmers to exercise control over the query plan chosen by the optimizer.
The SQLite website (https://www.sqlite.org/) uses SQLite itself, of course, and as of this writing (2015) it handles about 400K to 500K HTTP requests per day, about 15-20% of which are dynamic pages touching the database. Dynamic content uses about 200 SQL statements per webpage.
From within the sqlite3 command-line program you can do:
.timer ON select * from my_table; This will print the CPU time taken for the query.
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