FIX: An obvious delay occurs when a project that is based on Visual C++ 2005 uses a slow I/O device and a fast I/O device at the same time

In a project that is based on Microsoft Visual C++ 2005, an obvious delay occurs when the project uses a slow I/O device and a fast I/O device at the same time.

Note An example of a slow I/O device is a floppy disk. An example of a fast I/O device is a hard disk.

This problem occurs because of the excess protection from the Visual C++ runtime. If you open multiple files on different I/O devices, the Visual C++ runtime must acquire some critical sections to make sure that the shared resources are correctly serialized.

Note Critical sections are a kind of mechanism that prohibits more than one thread from running a particular section of code at a time.

Service pack information

To resolve this problem, obtain the latest service pack for Microsoft Visual Studio 2005. For more information, click the following article number to view the article in the Microsoft Knowledge Base:

Hotfix information

A supported hotfix is now available from Microsoft. However, it is intended to correct only the problem that is described in this article. Apply it only to systems that are experiencing this specific problem. This hotfix may receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next Visual Studio 2005 service pack that contains this hotfix.

To resolve this problem immediately, contact Microsoft Customer Support Services to obtain the hotfix. For a complete list of Microsoft Customer Support Services telephone numbers and information about support costs, visit the following Microsoft Web site:Note In special cases, charges that are ordinarily incurred for support calls may be canceled if a Microsoft Support Professional determines that a specific update will resolve your problem. The usual support costs will apply to additional support questions and issues that do not qualify for the specific update in question.

Prerequisites

You must have Visual Studio 2005 installed to apply this hotfix.

Hotfix replacement information

This hotfix does not replace any other hotfixes that are installed on the computer.

Restart requirement

You do not have to restart the computer after you apply this hotfix.

File information

The English version of this hotfix has the file attributes (or later file attributes) that are listed in the following table. The dates and times for these files are listed in Coordinated Universal Time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time item in Control Panel.

Visual Studio 2005, x86-based versions

Visual Studio 2005, x64-based versions

Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section. This problem was first corrected in Visual Studio 2005 Service Pack 1.

For more information, click the following article number to view the article in the Microsoft Knowledge Base: