Tcl Source Code

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The source code for Tcl is managed by fossil. Tcl developers coordinate all changes to the Tcl source code at

Tcl Source Code

Release Tcl 9.1a0 arises from the check-in with tag core-9-1-a0.

Highlighted differences between Tcl 9.1 and Tcl 9.0 are summarized below, with focus on changes important to programmers using the Tcl library and writing Tcl scripts.

New public C API

Performance

Bug fixes