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Re: ncurses: tgetent leaks nearly 10 KB of memory every time it is calle
Re: ncurses: tgetent leaks nearly 10 KB of memory every time it is called
Thu, 15 Jun 2006 18:30:50 -0400 (EDT)
On Thu, 15 Jun 2006, Matt wrote:
Dear GNU ncurses maintainers,
Sorry about the scary subject -- that's only a true statement for
the old version of ncurses (5.2-20020615) that the latest version
of FreeBSD (6.1) still uses for their standard curses library.
I think you've fixed that enormous leak already.
I might have. There's a known leak of the terminal data due to a knot in
the way "use=" clauses are combined. I don't recall checking for repeated
calls on tgetent(), though.
However, in ncurses 5.5 there still seems to be a very slow leak
in tgetent. I mentioned that in the bug report I filed to FreeBSD:
That's probably the fixup for sgr0 (makes a copy of it to translate into
termcap). I might be able to improve that (I seem to recall noticing
there was still a leak in it).
I clock it leaking 4 KB for every 200 calls to tgetent, or about
20 bytes per call. Sorry, I don't have any more time to investigate
it, but I figured I should drop you a note. If you write a little
program that calls tgetent(NULL, "vt100") repeatedly you should
be able to confirm or deny my observation.
curious - what sort of application (other than for testing) makes repeated
calls to tgetent() for the same $TERM ?
Thomas E. Dickey