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Prasanth Jayachandran commented on HIVE-17998: ---------------------------------------------- [~belugabehr] I benchmarked this in HIVE-17417 and it turned out JodaTime formatter was fastest (JDK 8's formatter is also pretty close). Since we already have jodatime dependency I added that in HIVE-17417. > Use FastDateFormat instead of SimpleDateFormat for TimestampWritable > -------------------------------------------------------------------- > > Key: HIVE-17998 > URL: https://issues.apache.org/jira/browse/HIVE-17998 > Project: Hive > Issue Type: Improvement > Components: Serializers/Deserializers > Affects Versions: 3.0.0, 2.4.0 > Reporter: BELUGA BEHR > Assignee: BELUGA BEHR > Priority: Trivial > Attachments: HIVE-17998.1.patch > > > Currently Hive is using this ThreadLocal/SimpleDateFormat setup to work > around the thread-safety limitations of SimpleDateFormat. > Let us simply drink the Apache Commons champagne and use thread-safe > {{org.apache.commons.lang.time.FastDateFormat}} instead. > {code:java|title=org.apache.hadoop.hive.serde2.io.TimestampWritable} > private static final ThreadLocal<DateFormat> threadLocalDateFormat = > new ThreadLocal<DateFormat>() { > @Override > protected DateFormat initialValue() { > return new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"); > } > }; > {code} -- This message was sent by Atlassian JIRA (v6.4.14#64029)