diff options
Diffstat (limited to 'app-shells/zsh/files/zsh-5.8.1-performance_regression_fix.patch')
| -rw-r--r-- | app-shells/zsh/files/zsh-5.8.1-performance_regression_fix.patch | 139 |
1 files changed, 0 insertions, 139 deletions
diff --git a/app-shells/zsh/files/zsh-5.8.1-performance_regression_fix.patch b/app-shells/zsh/files/zsh-5.8.1-performance_regression_fix.patch deleted file mode 100644 index 14a3f38eb96d..000000000000 --- a/app-shells/zsh/files/zsh-5.8.1-performance_regression_fix.patch +++ /dev/null @@ -1,139 +0,0 @@ -From cbe8d2bcdc20682464217856aa48628804637f28 Mon Sep 17 00:00:00 2001 -From: Bart Schaefer <schaefer@zsh.org> -Date: Thu, 28 Apr 2022 21:06:51 -0700 -Subject: [PATCH] 50133: use read-ahead and lseek-rewind for efficient - line-buffered input - ---- - ChangeLog | 6 ++++++ - Src/input.c | 24 ++++++++++++++++++++- - configure.ac | 59 ++++++++++++++++++++++++++++++++++++++++++++++++++++ - 3 files changed, 88 insertions(+), 1 deletion(-) - -diff --git a/ChangeLog b/ChangeLog -index cae2fc4e3..79c77741b 100644 ---- a/ChangeLog -+++ b/ChangeLog -@@ -1,3 +1,9 @@ -+2022-04-28 Bart Schaefer <schaefer@zsh.org> -+ -+ * 50133 (Bart, PWS, Jun-ichi): Src/input.c, configure.ac: when -+ lseek(2) is available, use it to check for and rewind read-ahead -+ for more efficient line-buffered input. -+ - 2022-03-03 Peter Stephenson <p.w.stephenson@ntlworld.com> - - * 49792: Src/input.c, Test/A01grammar.ztst: Use line buffering -diff --git a/Src/input.c b/Src/input.c -index caa8e23b0..6cc1b8a51 100644 ---- a/Src/input.c -+++ b/Src/input.c -@@ -217,12 +217,34 @@ shinbufrestore(void) - static int - shingetchar(void) - { -- int nread; -+ int nread, rsize = isset(SHINSTDIN) ? 1 : SHINBUFSIZE; - - if (shinbufptr < shinbufendptr) - return STOUC(*shinbufptr++); - - shinbufreset(); -+#ifdef USE_LSEEK -+ if (rsize == 1 && lseek(SHIN, 0, SEEK_CUR) != (off_t)-1) -+ rsize = SHINBUFSIZE; -+ if (rsize > 1) { -+ do { -+ errno = 0; -+ nread = read(SHIN, shinbuffer, rsize); -+ } while (nread < 0 && errno == EINTR); -+ if (nread <= 0) -+ return -1; -+ if (isset(SHINSTDIN) && -+ (shinbufendptr = memchr(shinbuffer, '\n', nread))) { -+ shinbufendptr++; -+ rsize = (shinbufendptr - shinbuffer); -+ if (nread > rsize && -+ lseek(SHIN, -(nread - rsize), SEEK_CUR) < 0) -+ zerr("lseek(%d, %d): %e", SHIN, -(nread - rsize), errno); -+ } else -+ shinbufendptr = shinbuffer + nread; -+ return STOUC(*shinbufptr++); -+ } -+#endif - for (;;) { - errno = 0; - nread = read(SHIN, shinbufendptr, 1); -diff --git a/configure.ac b/configure.ac -index af8c5bba8..42f2837cd 100644 ---- a/configure.ac -+++ b/configure.ac -@@ -2304,6 +2304,65 @@ if test x$zsh_cv_sys_fifo = xyes; then - AC_DEFINE(HAVE_FIFOS) - fi - -+dnl ----------- -+dnl check that lseek() correctly reports seekability. -+dnl ----------- -+AC_CACHE_CHECK(if lseek() correctly reports seekability, -+zsh_cv_sys_lseek, -+[AC_RUN_IFELSE([AC_LANG_SOURCE([[ -+#include <stdio.h> -+#include <sys/types.h> -+#include <fcntl.h> -+#include <unistd.h> -+#include <sys/socket.h> -+#include <sys/stat.h> -+int main() { -+ int pipefd[2], fd; -+ off_t ret; -+ char* tmpfile = "seekfiletest.tmp"; -+ if ((fd = open(tmpfile, O_CREAT, S_IRUSR)) < 0) { -+ fprintf(stderr, "creating file failed\n"); -+ return 1; -+ } -+ ret = lseek(fd, 0, SEEK_CUR); -+ close(fd); -+ unlink(tmpfile); -+ if (ret == (off_t)-1) { -+ fprintf(stderr, "lseek on regular file failed\n"); -+ return 1; -+ } -+ if (pipe(pipefd) < 0) { -+ fprintf(stderr, "creating pipe failed\n"); -+ return 1; -+ } -+ write(pipefd[1], "abcdefgh", 8); -+ ret = lseek(pipefd[0], 0, SEEK_CUR); -+ close(pipefd[0]); -+ close(pipefd[1]); -+ if (ret != (off_t)-1) { -+ fprintf(stderr, "lseek on pipe succeeded\n"); -+ return 1; -+ } -+ if ((fd = socket(AF_UNIX, SOCK_STREAM, 0)) < 0) { -+ fprintf(stderr, "creating UNIX domain socket failed\n"); -+ return 1; -+ } -+ ret = lseek(fd, 0, SEEK_CUR); -+ close(fd); -+ if (ret != (off_t)-1) { -+ fprintf(stderr, "lseek on UNIX domain socket succeeded\n"); -+ return 1; -+ } -+ return 0; -+} -+]])],[zsh_cv_sys_lseek=yes],[zsh_cv_sys_lseek=no],[zsh_cv_sys_lseek=yes]) -+]) -+AH_TEMPLATE([USE_LSEEK], -+[Define to 1 if lseek() can be used for SHIN.]) -+if test x$zsh_cv_sys_lseek = xyes; then -+ AC_DEFINE(USE_LSEEK) -+fi -+ - dnl ----------- - dnl test for whether link() works - dnl for instance, BeOS R4.51 doesn't support hard links yet --- -2.36.0 - |