ajantha-bhat commented on a change in pull request #3682: [CARBONDATA-3753]
optimize double/float stats collector
URL: https://github.com/apache/carbondata/pull/3682#discussion_r406024143
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File path:
core/src/main/java/org/apache/carbondata/core/datastore/page/statistics/PrimitivePageStatsCollector.java
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@@ -233,20 +233,18 @@ public void update(long value) {
/**
* Return number of digit after decimal point
- * TODO: it operation is costly, optimize for performance
*/
private int getDecimalCount(double value) {
int decimalPlaces = 0;
try {
- String strValue = BigDecimal.valueOf(Math.abs(value)).toPlainString();
- int integerPlaces = strValue.indexOf('.');
- if (-1 != integerPlaces) {
- decimalPlaces = strValue.length() - integerPlaces - 1;
+ BigDecimal decimalValue = BigDecimal.valueOf(value);
Review comment:
Actually double will not always be like `xx.yyy`, it will be having
`exponent` also.
So, Bigdecimal already converts to string and do that logic.
May be next version we can reduce further by removing big decimal and
copying API inside big decimal to do that.
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