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Next, we execute the runstats_pkg.rs_middle() method, followed by opening and closing the same select statement but this time in a parameterized static cursor, which is a candidate for being cached by the PL/SQL cursor cache: benchmark@ORA10G> exec runstats_pkg.rs_middle PL/SQL procedure successfully completed. benchmark@ORA10G> declare 2 cursor l_cursor( p_x in number) is 3 select x from t1 where x = p_x; 4 begin 5 for i in 1..10000 6 loop 7 open l_cursor( i ); 8 close l_cursor; 9 end loop; 10 end; 11 / PL/SQL procedure successfully completed. Notice how in code lines 2 and 3, we declare a static parameterized cursor that allows us to pass bind values as parameters. We open the cursor and pass the bind value in line 7. Finally, we execute the runstats_pkg.rs_stop() method to display the comparison results: benchmark@ORA10G> exec runstats_pkg.rs_stop(80) Run1 ran in 1461 hsecs Run2 ran in 644 hsecs run 1 ran in 226.86% of the time Name STAT...parse time elapsed <-- trimmed to save space --> LATCH.row cache objects Run1 82 30,024 Run2 0 18 Diff -82 -30,006

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In examining the ASPX markup, the class that gets generated from it, and the code-behind that it compiles with, we ve looked at all of the types that have the Page object in their inheritance trees. This is where code for the least general functionality goes. The code of the Page object itself is then the first class in the object graph that contains general functionality. This is familiar territory, as it s leveraged to create every ASP .NET page. We re talking about the Init and Load events of the Page type, the various server-side event traps, like Button.Click or TextBox.TextChanged, you can set up to trap events as they occur on the client. The Page level events, however, aren t specific to the Page type. If you follow the inheritance chain of the Page class up, you ll find the old familiar Control type. System.Web.UI.Control is the base type for every element you put on a web page. It s a base type for HTML Controls, for Web Controls, for User Controls, and for Custom Controls. It s very interesting to note that it s also a base type for the Page class itself. This means that the properties and methods of this type are exposed on practically everything you interact with programmatically on your page and on your Page object as well. Thus, understanding what s housed within this type is learning you can leverage everywhere in your development of Web Forms. Table 3-1. A Sample of Members from System.Web.UI.Control

oftware integration and reuse is becoming one of the most relevant activities of software development nowadays. In this chapter, we discuss how F# programs can interoperate with the outside world, accessing code available in the form of DLLs and COM components.

Run1 latches total versus runs -- difference and pct Run1 Run2 Diff Pct 81,789 50,808 -30,981 160.98% As you can see, the case where the PL/SQL cache was not in effect took more than twice the time and consumed 1.6 times the latches compared to the case where the PL/SQL cache was applicable. I ran the same test with SQL trace on. The following tkprof output shows the parse counts: call count ------- -----Parse 10001 cpu elapsed disk query current -------- ---------- ---------- ---------- ---------0.74 0.83 0 0 0 rows ---------0

This is a strong-typed collection of Control objects. The Page type s Control collection is what stores the base elements of your web page. Elements that are children of other elements then become instances of the Control type in their parent element s control collection. Together these aggregated ControlCollections create an in-memory tree of Control objects that models the hierarchy of the resulting web page. We ll be examining the ControlCollection in greater detail as we move forward. This new feature of ASP .NET 2.0 separates information critical to the functionality of the control from content-based ViewState information. This allows you to turn off ViewState without losing the ability to store some state on the client. This is a big problem with version 1.x Web Forms, which ControlState fixes in the new version. (See 4 for details on ControlState.) Using this Boolean, you can turn off the ViewState of any control. This is the data that gets squirreled away by individual controls in the hidden input that goes to the client. By persisting data to a hidden input on the client, the information gets POSTed back to the server, and so it becomes possible to restore that state on postbacks. The downside is this hidden input can get extremely large extremely fast, and performance suffers as you start moving all that data across the connection to your client and back to the server with a post. (We ll examine some best practices for minimizing the ViewState size in

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