Server Performance Considerations
Real-time programs can affect server performance. SSI doesn't bring anything new to the table in that regard.
In general, SSI programs tend to be less of a drain on the server than full-fledged CGI. SSI programs are usually small—they only have to produce text, after all—and seldom do much of any significance with files. Page hit counters that rely on generating inline graphics put far more stress on a server than an SSI counter does.
Still, a dozen—or a hundred—instances of your SSI program running at once can steal memory and processor slices needed by the server to satisfy client requests. Imagine that you are the Webmaster of a large site. On each of the 250 pages for which you're responsible, you include ...
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