bd2019us

Hello, Is it a good way to use PreparedStatement in line 212 and 213? Because the "executeQuery" is in a while loop and the query is compiled only once when...

Change Date.getTime() to System.currentTimeMillis()

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Hello, new Date() is a wrapper of method System.currentTimeMillis(). If it is intensively invoked in the program, the performance will be greatly damaged. According to my local testing, when these...

Fix Issue [#LENS-1543](https://issues.apache.org/jira/browse/LENS-1543) The replaceAll() method will compile the given regular expression ahead of time even though the given string is simply a plain string, which will have a bad...

[CTAKES-531] change String.replaceAll() to replace() to improve performance

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Fix ISSUE [#CTAKES-531-PATCH](https://issues.apache.org/jira/browse/CTAKES-531). Since the string to be replaced contains none special characters, there is no need to use regular expression that in turn has bad influence to the performance.

use PreparedStatement

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Hello, Is it a good way to use "PreparedStatement" instead of "createStatement" in order to improve performance? "PreparedStatement" is used to execute dynamic or parameterized SQL queries. It is helpful...

PLUTO-778 Fix String.replaceAll() to replace() for better performance

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Fix ISSUE [#PLUTO-778](https://issues.apache.org/jira/browse/PLUTO-778) Use String.repalce() for better performance.

Hello, I found that the String "mode" may cause potential risk of NullPointerException since the method "getParameter" may return a null value. One recommended API is Objects.equals(String,String) which can avoid...

…ve performance overhead [CASSANDRA-15125](https://issues.apache.org/jira/browse/CASSANDRA-15125) Math.random has a slight performance overhead associated with itself that does not exist in Random.nextDouble. These instances of Math.random, such as those sampled below, can be...