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java Programming Glossary: measuredIs it safe to get values from a java.util.HashMap from multiple threads (no modification)? http://stackoverflow.com/questions/104184/is-it-safe-to-get-values-from-a-java-util-hashmap-from-multiple-threads-no-modi using a java.util.concurrent.ConcurrentHashMap and have no measured need to improve performance but am simply curious if a simple..
http://stackoverflow.com/questions/115835/what-is-the-best-method-to-capture-images-from-a-live-video-device-for-use-by-a latency at less than 100 milliseconds if possible. That's measured as the time between my control input to the time when I see..
Equivalent of DateTime.Now in Java? http://stackoverflow.com/questions/2010284/equivalent-of-datetime-now-in-java so that it represents the time at which it was allocated measured to the nearest millisecond. Make sure you're using java.util.Date..
http://stackoverflow.com/questions/2117072/java-thread-creation-overhead fear is that the problems may be more subtle than can be measured with a profiler. Note the wisdom of using thread locals is not..
How Best to Compare Two Collections in Java and Act on Them? http://stackoverflow.com/questions/23445/how-best-to-compare-two-collections-in-java-and-act-on-them most likely max out at 20 This code is called frequently measured in millions day although the sets seldom differ My questions..
Joda-Time: what's the difference between Period, Interval and Duration? http://stackoverflow.com/questions/2653567/joda-time-whats-the-difference-between-period-interval-and-duration A duration in Joda Time represents a duration of time measured in milliseconds. The duration is often obtained from an interval...
Calculating the angle between the line defined by two points http://stackoverflow.com/questions/2676719/calculating-the-angle-between-the-line-defined-by-two-points is the point at the center of the screen. theta is measured counter clockwise from the x axis. Then delta_x touch_x center_x..
http://stackoverflow.com/questions/2842695/what-is-microbenchmarking optimizations is one of them. If the operation being measured takes so little time that whatever you use to measure it takes..
how to resume an interrupted download - part 2 http://stackoverflow.com/questions/3428102/how-to-resume-an-interrupted-download-part-2 that time limit on user written scripts . However when I measured the timing of the download interrupts I saw that the interrupt..
Access C++ shared library from Java: JNI, JNA, CNI, or SWIG? http://stackoverflow.com/questions/3720563/access-c-shared-library-from-java-jni-jna-cni-or-swig be slower than JNI by an order of magnitude. However I measured individual calls at a few hundred nanoseconds on one machine..
Why should casting be avoided? http://stackoverflow.com/questions/4167304/why-should-casting-be-avoided be used for counted types of things and floating point for measured kinds of things. Ignoring the distinction is what leads to some..
Calculating difference in dates in Java http://stackoverflow.com/questions/453388/calculating-difference-in-dates-in-java between two calls to System.getCurrentTimeMillis measured on the same system you will get a valid number of milliseconds..
Relationship between JMS connections, sessions, and producers/consumers http://stackoverflow.com/questions/4741713/relationship-between-jms-connections-sessions-and-producers-consumers down to one. If your 20k messages are relatively small measured in k and not mb then you probably want to use transacted sessions..
How can I measure time with microsecond precision in Java? http://stackoverflow.com/questions/503877/how-can-i-measure-time-with-microsecond-precision-in-java than 1 million because I'm not getting the correct measured time with what I'm using now System.nanoTime Edit 2 Yes I'm..
Why does JSF need to save the state of UI components on the server side? http://stackoverflow.com/questions/5474316/why-does-jsf-need-to-save-the-state-of-ui-components-on-the-server-side users and then give the appserver 125 ~ 150 of maximum measured memory. Note that JSF 2.0 has improved a lot in state management...
How to calculate the number of rows (and columns in each row) a text takes in a JTextArea? http://stackoverflow.com/questions/5979795/how-to-calculate-the-number-of-rows-and-columns-in-each-row-a-text-takes-in-a not necessarily the sum of the advances of its characters measured in isolation The preferred size of the text component matches..
Java XPath (Apache JAXP implementation) performance http://stackoverflow.com/questions/6340802/java-xpath-apache-jaxp-implementation-performance XPath evaluations of SomeNodeName against a 90k XML file measured with System.nanoTime measured library Xalan 2.7.0 Xalan 2.7.1.. against a 90k XML file measured with System.nanoTime measured library Xalan 2.7.0 Xalan 2.7.1 Saxon HE 9.3 jaxen 1.1.3 ..
http://stackoverflow.com/questions/7146207/what-is-the-best-macro-benchmarking-tool-framework-to-measure-a-single-threade phase can it plot the results visually can it store the measured values persistently can it do trend analysis to warn that a..
http://stackoverflow.com/questions/7699020/what-makes-jni-calls-slow back. The cost can be linear in the size of the array. I measured JNI copying of a 100 000 array to average about 75 microseconds..
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