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Practical Programming in Tcl and Tk, Fourth Edition by Brent Welch, Ken Jones

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Chapter 58. Tcl/Tk 8.4

Tcl 8.4 provided significant performance improvements, many new commands and options, and three new Tk widgets.

Speed was a primary objective of Tcl/Tk 8.4. Version 8.0 provided major performance improvements to Tcl with the introduction of the bytecode compiler. But new features added in version 8.1 (in particular, multi-threaded support and internationalization support with Unicode strings) slowed down Tcl significantly. The goal for 8.4 was for scripts to run as fast as — or faster than — they did under 8.0, and the goal was achieved in almost all areas of the language.

Tcl/Tk 8.4 is perhaps the most significant release since 8.1 in terms of new features. Virtually all aspects of the language gained new functionality, and ...

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