net.objectlab.kit.util.excel.ExcelWorkbookTest$$Lambda$1/868693306@13221655
| Algo | Average (ms) | Min (ms) | Max (ms) |
|---|---|---|---|
| Use Total in a for loop | 0.1 | 0 | 4 |
| Use Total with java8 forEach | 0.1 | 0 | 40 |
| Use Total and java8 map() | 0.1 | 0 | 6 |
| Use Java8 map and reduce | 0 | 0 | 2 |
| Use Java8 map, reduce and accumulator | 0 | 0 | 2 |
| Use Java8 and home-made Collector | 0.1 | 0 | 6 |
| Use Java8 and ObjectLabKit Calculator | 0 | 0 | 2 |
| Use Java8 and Parallel Stream | 0.1 | 0 | 10 |
| Algo | Average (ms) | Min (ms) | Max (ms) |
|---|---|---|---|
| Use Total in a for loop | 1 | 0 | 20 |
| Use Total with java8 forEach | 1.1 | 0 | 48 |
| Use Total and java8 map() | 2.1 | 1 | 40 |
| Use Java8 map and reduce | 1.2 | 1 | 9 |
| Use Java8 map, reduce and accumulator | 1.2 | 1 | 10 |
| Use Java8 and home-made Collector | 1.4 | 1 | 12 |
| Use Java8 and ObjectLabKit Calculator | 1.2 | 1 | 11 |
| Use Java8 and Parallel Stream | 0.6 | 0 | 17 |
public class A {
private int intProperty;
private Long longProperty;
private String stringProperty;
private Date dateProperty;
private B b = new B();
}
public class B {
private int intProperty = 5;
private C c = new C();
private D[] d = new D[10];
}
public class C {
private String stringProperty;
}
public class D {
private int intProperty = 1;
}
| Library | Total time (ms) | average per set (micro sec) |
| Spring | 1,783 ms | 17.8 micro sec |
| Bean Utils | 2,242 ms | 22.4 micro sec |
| OGNL | 50,293 ms | 503 micro sec |
| OGNL Expression | 1,595 ms | 16 micro sec |
In designing a new, very performance-sensitive part of our systems we investigated the runtime performance of retrieving beans (singleton and prototype) from a Spring bean factory versus creating them via a hand-coded factory. For the Spring code we also measured any additional overhead of auto-wiring beans and doing dependency checks on beans.
The test repeatedly retrieves 5 beans which are the roots of a highly interconnected object graph (comprising 4 other beans) from a Spring bean factory. In the prototype tests each bean in that graph is a Spring prototype bean, i.e. a new instance is create whenever a bean is needed from the bean factory. In the singleton tests each bean in that graph is a Spring singleton and so the same instance is returned every time a bean is retrieved. By comparison, the hand-coded factory always creates each object in that graph and hence behaves identical to the Spring prototype test.
The results give the time in nanoseconds for retrieving a bean (which is the root of the object graph) from the factory:
| Bean retrieval / nanoseconds | Spring 2.0.5 | Spring 2.0.4 | Spring 2.0.3 | Spring 2.0.2 |
| Spring, prototype, autowire=byType, depend check | 442365 | 500050 | 945551 | 958805 |
| Spring, prototype, autowire=byName, depend check | 253870 | 255557 | 667352 | 678782 |
| Spring, prototype, no autowire, depend check | 172412 | 173539 | 624171 | 639640 |
| Spring, prototype, no autowire,no depend check | 162300 | 162950 | 586144 | 600320 |
| Spring, singleton, autowire=byType, depend check | 608 | 841 | 1075 | 1134 |
| Spring, singleton, autowire=byName,depend check | 710 | 840 | 1069 | 1132 |
| Spring, singleton, no autowire,depend check | 609 | 842 | 1097 | 1161 |
| Spring, singleton, no autowire, no depend check | 614 | 837 | 1102 | 1135 |
| No Spring (hand-coded factory),always create (prototype) | 284 | 284 | 288 | 292 |
The code we used to perform these measurements and all results are available here.
Hi *,
ObjectLab is very pleased to announce the immediate release of JTreeMap 1.1.0, a heatmap/treemap visual library for JDK 5.0. We believe this is the only open source library of this kind under a business friendly license.
Towards the end of 2006, ObjectLab got involved with JTreeMap as part of a financial application. Laurent Dutheil had been developing it but found it more time consuming that anticipated. It is where ObjectLab offered some expertise and the result is the new release 1.1.0. We acknowledge and thank Laurent for his great contribution.
Home page: http://jtreemap.sourceforge.net
The release is available on SF and on 2 Maven repositories (whilst we’re going through the process of adding it in the official repository). The ObjectLab Open Source repositories are:
http://objectlabkit.sourceforge.net/m2-repo
and
http://objectlabkit.sourceforge.net/m1-repo
The question of how to represent and visualize a lot of information at a glance is a hot topic in IT. A Treemap, also known as Heatmap, is an important tool for this. A TreeMap graphically represents a hierarchical structure.
Typically, the hierarchy will involve a tree of nodes of different sizes and different colours. The size and colours are determined by parameters such as the relative importance of a node in comparison to the full size. A well known examples is the Map of the Market on www.smartmoney.com but their library is not open source (and very pricey!).
JTreeMap comes in 2 flavours: JTreeMap for Swing and KTreeMap for SWT.
Enjoy!
Benoit & the rest of the ObjectLab Team.
