Re: nomuch_addresses.py

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+From: Tomi Ollila <tomi.ollila@iki.fi>\r
+To: Justus Winter <4winter@informatik.uni-hamburg.de>,\r
+       Daniel Schoepe <daniel@schoepe.org>,\r
+       Philippe LeCavalier <support@plecavalier.com>, notmuch@notmuchmail.org\r
+Subject: Re: nomuch_addresses.py\r
+In-Reply-To: <20120221091509.8534.59492@thinkbox.jade-hamburg.de>\r
+References: <87r4xur3rv.fsf@plc.plecavalier.com>\r
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+Date: Tue, 21 Feb 2012 13:23:11 +0200\r
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+On Tue, 21 Feb 2012 09:15:09 -0000, Justus Winter <4winter@informatik.uni-hamburg.de> wrote:\r
+> Quoting Daniel Schoepe (2012-02-17 02:28:52) [emphasis mine]:\r
+> >Just for completeness: I'm using the nice nottoomuch-addresses.pl script\r
+> >[1] by Tomi Ollila *which doesn't require any bindings* and is incredibly\r
+> >fast (after generating an initial address database).\r
+> \r
+> I don't get it. The perl script isn't using any library bindings,\r
+> mainly because there are no libnotmuch bindings for perl. *But* it\r
+> does call the notmuch binary which is worse:\r
+> \r
+> * incredibly high overhead (fork&exec) compared to a simple function\r
+>   call (plus maybe some kind of ffi)\r
+> * manual and error prone serialization of ''function arguments''\r
+> * manual and error prone deserialization of ''return values''\r
+> * very limited error reporting and handling capabilities\r
+> * any kind of resource (think handle to a xapian database) is lost if\r
+>   the process exists resulting in further overhead if the binary is\r
+>   called multiple times\r
+\r
+Shortly answering nottoomuch-addresses.sh's (version 2.0) point of view.\r
+\r
+Searching from "database" is done using fgrep. that means 2 forks, 2 execs\r
+from command line (it used to be one fork but now we handle fgrep return\r
+value) (fork, exec /bin/sh, fork, exec fgrep). Anyway, usually matches are\r
+printed out by fgrep before ENTER key has risen (or TAB when run from\r
+emacs).\r
+\r
+The "database" is created by perl program ("embedded" in\r
+nottoomuch-addresses.sh), it executes notmuch once to get all email\r
+filenames (since beginning of time or since last update) -- the perl code\r
+then parses email addresses out of those files, cleans those up, removes\r
+duplicates and writes those to the "database" files (all and one with\r
+ignored removed)... So that newest are in top of the file, returned first\r
+in fgrep(1) execution.\r
+\r
+> I do get the feeling that it is perceived as desirable not to require\r
+> any kind of notmuch bindings (David once said something similar about\r
+> nmbug).\r
+> \r
+> If that's the case I'd love to hear why and if there's anything we can\r
+> do about it.\r
+\r
+It would be nice if notmuch(1) itself had command to be used for\r
+address completion. I wonder how feasible it is to get a good implementation\r
+there...\r
+\r
+> \r
+> Justus\r
+\r
+Tomi\r