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python Programming Glossary: scan_start_time

Why is the same SQLite query being 30 times slower when fetching only twice as many results?

http://stackoverflow.com/questions/10531898/why-is-the-same-sqlite-query-being-30-times-slower-when-fetching-only-twice-as-m

spectrum.msrun_msrun_id WHERE spectrum.scan_start_time BETWEEN feature.rtMin AND feature.rtMax AND MSMS_precursor.ion_mz.. spectrum.msrun_msrun_id WHERE spectrum.scan_start_time BETWEEN feature.rtMin AND feature.rtMax AND MSMS_precursor.ion_mz.. TABLE spectrum USING INDEX fk_spectrum_scahn_start_time_1 scan_start_time AND scan_start_time ~3125 rows ' 0 2 0 u'SEARCH TABLE MSMS_precursor..