From 62b2ac161827d82e3d427dd9ece3c25fb16d70a5 Mon Sep 17 00:00:00 2001
From: Lukas Stadler <lukas.stadler@oracle.com>
Date: Mon, 30 Nov 2015 13:50:34 +0100
Subject: [PATCH] performance fix in Covcor
---
.../src/com/oracle/truffle/r/library/stats/Covcor.java | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/com.oracle.truffle.r.library/src/com/oracle/truffle/r/library/stats/Covcor.java b/com.oracle.truffle.r.library/src/com/oracle/truffle/r/library/stats/Covcor.java
index c53c52b4cf..845819db44 100644
--- a/com.oracle.truffle.r.library/src/com/oracle/truffle/r/library/stats/Covcor.java
+++ b/com.oracle.truffle.r.library/src/com/oracle/truffle/r/library/stats/Covcor.java
@@ -472,10 +472,10 @@ public final class Covcor extends RExternalBuiltinNode {
} else {
sum = 0.0;
loopLength.profileLength(n);
- double[] u = Arrays.copyOfRange(xData, i * n, i * n + n);
- double[] v = Arrays.copyOfRange(xData, j * n, j * n + n);
for (int k = 0; loopLength.inject(k < n); k++) {
- temp[k] = (u[k] - xxm) * (v[k] - yym);
+ double u = xData[i * n + k];
+ double v = xData[j * n + k];
+ temp[k] = (u - xxm) * (v - yym);
}
for (int k = 0; loopLength.inject(k < n); k++) {
sum += temp[k];
--
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