Page 284 - DCAP312_WEB_TECHNOLOGIES_II

Web Technologies-II

Notes given product, the approach would be to handle the update as normal, then create a cache key
for all products, and one for just the product ID in question. Then use those keys to kick both
objects out of cache.
This approach does not require much more coding than normal, but it allows much more robust
caching without the need to accept a certain threshold of stale data, nor does it require incurring
the overhead of SQL Server cache invalidation.

Finally, since this approach to creating cache keys results in hierarchical names, it becomes fairly
easy to remove entire blocks of cache key entries by creating a partial cache key and then removing
any entry within the native cache providers’ set of keys that .StartsWith(partialKey) as it were.
The point is that a bit of planning and effort can help take an already powerful component of
ASP.NET and make it even more robust in terms of enabling unit testing, mocking, and more
powerful and robust access—all through the use of a simple wrapper.

Visual C++ 2010 (known also as Visual C++ 10.0) was released on April 12,
2010, and it is currently the latest stable release.

Self Assessment Questions
1. ………… is the process of finding and correcting the errors in a program.
(a) Compiler (b) Debugging
(c) Interpreter (d) None of these
2. ASP.NET is a web application framework developed by ...................
(a) Oracle (b) Sun Java
(c) Microsoft (d) All of these
3. Cassini is a lightweight …………… source web server.
(a) open (b) close
(c) both of (a) and (b) (d) curve
4. Performance profiling is a ................... process that requires developers to run through
repeated iterations of profiling and optimization.
(a) strategic (b) easy
(c) raw (d) complicated
True or False
5. Optimization is the act of improving a method or design.
(a) True (b) False

14.3 Optimizing via Performance Profiling

Performance profiling is a complicated process that requires developers to run through repeated
iterations of profiling and optimization. There are a number of factors affecting performance
that operate independently and so must be tackled independently, often by different groups
of people. Developers must tackle application coding issues by identifying the offending code
blocks and then rewriting or optimizing them. System administrators must tackle server resource
problems by examining the full set of tasks that the server is handling. Performance profiling
has to be a cooperative task between different groups of people because at the end of the day,
a user who experiences slow performance will be unhappy with the experience, regardless of
whose piece of the puzzle is causing the issue. Performance profiling affects everyone on the
technical team, and so it must engage everyone as well.

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