THDA commented on issue #2436: Slow query in SQL Lab URL: https://github.com/apache/incubator-superset/issues/2436#issuecomment-364883611 Confirmed here, this is dead slow and needs fixing, it even triggers a "this site does not respond" on ie. Turning on profiling, I see the following top offenders (displaying 3K rows here): Function | Count | Inclusive time | Exclusive time -----------|----------|----------------|---------------- appendChild|33?428|10?121,00|10?112,00 removeChild|9?973|7?047,00|6?749,00 innerHTML|57?173|5?857,00|5?856,00 getClientRects|247|3?467,00|3?467,00 n|6?342|1?650,00|1?071,00 There is definitely a need for server side pagination when supported by the underlying engine. Another way would be to postpone more things, for example only run those append/remove when the user clicks on the "next" button.
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