Welcome to Rational Quantify 

Your customers want the fastest possible software. They want your program to work instantaneously and make the most of their computing resources. Inferior performance reduces their satisfaction with the features you worked so hard to include. Bad performance can kill your application. Users have no patience with slow-running programs. They quickly lose interest when they have to wait. 

So what can you do about it? 

The practical solution is to identify bottlenecks, and then reduce or eliminate them, through systematic performance engineering. Begin monitoring performance just as soon as you have a working program, when it's easiest and most economical to make structural changes. Continue tuning performance until you're ready to ship. Weigh the cost of implementing each improvement against the benefits you expect from it. 

How can you get the data you need for performance engineering? 

Rational® Quantify® puts successful performance engineering within your grasp. It provides complete, accurate performance data—and provides it in an understandable and usable format so that you can see exactly where your code is least efficient. Using Quantify, you can make virtually any program run faster. And you can measure the results. 

Quantify measures performance for every component in: 

  • Visual C/C++ code in .exes, .dlls, OLE/ActiveX controls, and COM objects 
  • Visual Basic projects and p-code .exes (Visual Basic 6.0), native-code .exes (Visual Basic 5.0 and later), .dlls, OLE/ActiveX controls, and COM objects 
  • Java applets, class files, and code launched by container programs (in conjunction with the Microsoft virtual machine for Java) 
  • Components launched from container programs such as Microsoft Internet Explorer, the Microsoft Transaction Server, jexegen’d executables, Jview.exe, Tstcon32.exe, Netscape Navigator, or any Microsoft Office application 
  • Microsoft Excel and Microsoft Word plug-ins
Quantify automatically integrates with Microsoft Developer Studio 97 and later, and Microsoft Visual Basic 5.0 and later, so you can use Quantify without changing the way you work. 

More information? For information about using Quantify integrated with your development environment, look up developer studio and visual basic in the Quantify online Help index. 

This book shows you how to use Quantify to find performance bottlenecks, and introduces the features that make Quantify a powerful, flexible performance engineering tool. As you read this book, keep in mind that any discussion that applies to functions and modules also applies to Java methods and class files, and to Visual Basic procedures and object libraries. 

More information? Quantify’s online Help provides detailed reference information and step-by-step instructions for using Quantify. For a start, look up quantify, overview in the Quantify online Help index. 

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