Avoid overflow for warmup end time computation

1 files changed, 2 insertions, 2 deletions

diff --git a/vespajlib/src/main/java/com/yahoo/compress/Compressor.java b/vespajlib/src/main/java/com/yahoo/compress/Compressor.java
index fcbc89307b8..3e9d704e11c 100644
--- a/vespajlib/src/main/java/com/yahoo/compress/Compressor.java
+++ b/vespajlib/src/main/java/com/yahoo/compress/Compressor.java
@@ -194,14 +194,14 @@ public class Compressor {
     public long warmup(double seconds) {
         byte [] input = new byte[0x4000];
         new Random().nextBytes(input);
-        long timeDone = System.nanoTime() + (long)(seconds*1000000000);
+        long startTime = System.nanoTime();
         long compressedBytes = 0;
         byte [] decompressed = new byte [input.length];
         LZ4FastDecompressor fastDecompressor = factory.fastDecompressor();
         LZ4SafeDecompressor safeDecompressor = factory.safeDecompressor();
         LZ4Compressor fastCompressor = factory.fastCompressor();
         LZ4Compressor highCompressor = factory.highCompressor();
-        while (System.nanoTime() < timeDone) {
+        while (System.nanoTime() - startTime < seconds * 1e9) {
             byte [] compressedFast = fastCompressor.compress(input);
             byte [] compressedHigh = highCompressor.compress(input);
             fastDecompressor.decompress(compressedFast, decompressed);