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Title Should I use ADOVBS.inc for declaring constants?
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Category ASP » Database
Hits 4836
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Sadly, VBScript does not understand ADO constants, such as AdLockReadOnly, the way VB does. Luckily (or unluckily) for the developer, the immense number of constants for use with ADO is compiled in a file called ADOVBS.inc. When starting out with database development, everyone is told to use the constant names (as opposed to their integer counterparts), and to include ADOVBS.inc. This recommendation is given by many people, even if you are only using 2 or 3 of the 393 constants that are listed in ADOVBS.inc. These 393 constants result in an overall raw read size of 14,639 bytes. Never mind the amount of memory allocated to holding all of those variables, most of which you have no intention of using. On a small, single-user app, you won't see a difference. However, when you have 300 people on your site at once, every single user has to load that 15kb file, and every user has 393 extra page-level variables in memory... this can really add up.

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