From owner-svn-src-head@FreeBSD.ORG Fri Dec 27 15:52:19 2013 Return-Path: Delivered-To: svn-src-head@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [8.8.178.115]) (using TLSv1 with cipher ADH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id 82ECB233; Fri, 27 Dec 2013 15:52:19 +0000 (UTC) Received: from svn.freebsd.org (svn.freebsd.org [IPv6:2001:1900:2254:2068::e6a:0]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mx1.freebsd.org (Postfix) with ESMTPS id 6F2F81923; Fri, 27 Dec 2013 15:52:19 +0000 (UTC) Received: from svn.freebsd.org ([127.0.1.70]) by svn.freebsd.org (8.14.7/8.14.7) with ESMTP id rBRFqJ9W099870; Fri, 27 Dec 2013 15:52:19 GMT (envelope-from jilles@svn.freebsd.org) Received: (from jilles@localhost) by svn.freebsd.org (8.14.7/8.14.7/Submit) id rBRFqJNw099869; Fri, 27 Dec 2013 15:52:19 GMT (envelope-from jilles@svn.freebsd.org) Message-Id: <201312271552.rBRFqJNw099869@svn.freebsd.org> From: Jilles Tjoelker Date: Fri, 27 Dec 2013 15:52:19 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r259946 - head/bin/sh X-SVN-Group: head MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-BeenThere: svn-src-head@freebsd.org X-Mailman-Version: 2.1.17 Precedence: list List-Id: SVN commit messages for the src tree for head/-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 27 Dec 2013 15:52:19 -0000 Author: jilles Date: Fri Dec 27 15:52:18 2013 New Revision: 259946 URL: http://svnweb.freebsd.org/changeset/base/259946 Log: sh: Don't check input for non-whitespace if history is disabled. preadbuffer() maintained a flag whether there was any non-whitespace character. This flag is only useful when history is enabled (in that case, lines containing only whitespace are not added to history). Instead, check using strspn() when history is enabled. There is an approximate 2% speedup when running sh -c '. /etc/rc.subr; . /etc/defaults/rc.conf; source_rc_confs' with hot cache. Modified: head/bin/sh/input.c Modified: head/bin/sh/input.c ============================================================================== --- head/bin/sh/input.c Fri Dec 27 15:44:16 2013 (r259945) +++ head/bin/sh/input.c Fri Dec 27 15:52:18 2013 (r259946) @@ -228,7 +228,6 @@ preadbuffer(void) { char *p, *q; int more; - int something; char savec; if (parsefile->strpush) { @@ -252,24 +251,18 @@ again: q = p = parsefile->buf + (parsenextc - parsefile->buf); /* delete nul characters */ - something = 0; for (more = 1; more;) { switch (*p) { case '\0': p++; /* Skip nul */ goto check; - case '\t': - case ' ': - break; - case '\n': parsenleft = q - parsenextc; more = 0; /* Stop processing here */ break; default: - something = 1; break; } @@ -288,7 +281,8 @@ check: *q = '\0'; #ifndef NO_HISTORY - if (parsefile->fd == 0 && hist && something) { + if (parsefile->fd == 0 && hist && + parsenextc[strspn(parsenextc, " \t\n")] != '\0') { HistEvent he; INTOFF; history(hist, &he, whichprompt == 1 ? H_ENTER : H_ADD,