fetch: Speed up fetch of large numbers of refs

diff --git a/builtin-fmt-merge-msg.c b/builtin-fmt-merge-msg.c
index c566c2df77b1b7da2bff11c70e06b91128fdc71e..9d524000b5ba4d9c7566edd5756b68d728ec362b 100644 (file)
--- a/builtin-fmt-merge-msg.c
+++ b/builtin-fmt-merge-msg.c
@@ -256,8 +256,7 @@ static void shortlog(const char *name, unsigned char *sha1,
 
 int fmt_merge_msg(int merge_summary, struct strbuf *in, struct strbuf *out) {
        int limit = 20, i = 0, pos = 0;
-       char line[1024];
-       char *p = line, *sep = "";
+       char *sep = "";
        unsigned char head_sha1[20];
        const char *current_branch;
 
@@ -271,9 +270,8 @@ int fmt_merge_msg(int merge_summary, struct strbuf *in, struct strbuf *out) {
        /* get a line */
        while (pos < in->len) {
                int len;
-               char *newline;
+               char *newline, *p = in->buf + pos;
 
-               p = in->buf + pos;
                newline = strchr(p, '\n');
                len = newline ? newline - p : strlen(p);
                pos += len + !!newline;
@@ -353,7 +351,7 @@ int cmd_fmt_merge_msg(int argc, const char **argv, const char *prefix)
        struct option options[] = {
                OPT_BOOLEAN(0, "log",     &merge_summary, "populate log with the shortlog"),
                OPT_BOOLEAN(0, "summary", &merge_summary, "alias for --log"),
-               OPT_STRING('F', "file",   &inpath, "file", "file to read from"),
+               OPT_FILENAME('F', "file", &inpath, "file to read from"),
                OPT_END()
        };
 
@@ -362,20 +360,19 @@ int cmd_fmt_merge_msg(int argc, const char **argv, const char *prefix)
        int ret;
 
        git_config(fmt_merge_msg_config, NULL);
-       argc = parse_options(argc, argv, options, fmt_merge_msg_usage, 0);
+       argc = parse_options(argc, argv, prefix, options, fmt_merge_msg_usage,
+                            0);
        if (argc > 0)
                usage_with_options(fmt_merge_msg_usage, options);
-       inpath = parse_options_fix_filename(prefix, inpath);
 
        if (inpath && strcmp(inpath, "-")) {
                in = fopen(inpath, "r");
                if (!in)
-                       die("cannot open %s", inpath);
+                       die_errno("cannot open '%s'", inpath);
        }
 
        if (strbuf_read(&input, fileno(in), 0) < 0)
-               die("could not read input file %s", strerror(errno));
-
+               die_errno("could not read input file");
        ret = fmt_merge_msg(merge_summary, &input, &output);
        if (ret)
                return ret;