git diff too slow for a file

diff --git a/run-command.h b/run-command.h
index 967ba8cc09786934724132b629587419f195b245..94619f52d95888b320664b7f19db3eeb7d6d8cca 100644 (file)
--- a/run-command.h
+++ b/run-command.h
@@ -18,7 +18,7 @@ struct child_process {
         * - Specify > 0 to set a channel to a particular FD as follows:
         *     .in: a readable FD, becomes child's stdin
         *     .out: a writable FD, becomes child's stdout/stderr
-        *     .err > 0 not supported
+        *     .err: a writable FD, becomes child's stderr
         *   The specified FD is closed by start_command(), even in case
         *   of errors!
         */
@@ -66,17 +66,20 @@ int run_command_v_opt_cd_env(const char **argv, int opt, const char *dir, const
  */
 struct async {
        /*
-        * proc writes to fd and closes it;
+        * proc reads from in; closes it before return
+        * proc writes to out; closes it before return
         * returns 0 on success, non-zero on failure
         */
-       int (*proc)(int fd, void *data);
+       int (*proc)(int in, int out, void *data);
        void *data;
+       int in;         /* caller writes here and closes it */
        int out;        /* caller reads from here and closes it */
 #ifndef WIN32
        pid_t pid;
 #else
        HANDLE tid;
-       int fd_for_proc;
+       int proc_in;
+       int proc_out;
 #endif
 };