Significantly reduce loading time for mutations table in comparison page #4714
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Helps fix issue on comparison page mutations tab where the mutations table takes a long time to load when there are a large number of mutations. This fix reduces loading time.
e.g.
https://www.cbioportal.org/comparison/mutations?comparisonId=61791fa92e3200072db9b64e
This query goes from not being able to finish in a reasonable time to finishing in around 30 seconds.
https://www.cbioportal.org/comparison/mutations?comparisonId=61791fa92e3200072db9b64e&selectedGene=TERT
This query goes from finishing in around 28 seconds to around 10 seconds.