himanshug commented on a change in pull request #8373: Speed up
ExpressionSelectors.makeExprEvalSelector
URL: https://github.com/apache/incubator-druid/pull/8373#discussion_r317422681
##########
File path: core/src/main/java/org/apache/druid/math/expr/ExprMacroTable.java
##########
@@ -97,9 +99,13 @@ public Expr get(final String functionName, final List<Expr>
args)
{
protected final Expr arg;
+ // Use Supplier to memoize values as
ExpressionSelectors#makeExprEvalSelector() can make repeated calls for them
+ private final Supplier<BindingDetails> analyzeInputsSupplier;
+
public BaseScalarUnivariateMacroFunctionExpr(Expr arg)
{
this.arg = arg;
+ analyzeInputsSupplier = Suppliers.memoize(this::supplyAnalyzeInputs);
Review comment:
btw, did the perf difference come from this change or from converting
streams to for loops ?
----------------------------------------------------------------
This is an automated message from the Apache Git Service.
To respond to the message, please log on to GitHub and use the
URL above to go to the specific comment.
For queries about this service, please contact Infrastructure at:
[email protected]
With regards,
Apache Git Services
---------------------------------------------------------------------
To unsubscribe, e-mail: [email protected]
For additional commands, e-mail: [email protected]
