Github user wzhfy commented on the issue: https://github.com/apache/spark/pull/16401 do you mean no cache for `def statistics(conf)`: ``` def statistics(conf: CatalystConf): Statistics = { if(conf.cboEnabled) newStats else oldStats } lazy val newStats... lazy val oldStats... ``` or no cache for anything: ``` def statistics(conf: CatalystConf): Statistics = { if(conf.cboEnabled) { calculate old stats } else { calculated new stats } } ``` The lattter can be a performance hit because statistics need to be computed every time it's called.
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