diff --git a/proc-del-loop-sscanf-for-proc-pid-stat-file.patch b/proc-del-loop-sscanf-for-proc-pid-stat-file.patch
new file mode 100644
index 0000000..27cfec5
--- /dev/null
+++ b/proc-del-loop-sscanf-for-proc-pid-stat-file.patch
@@ -0,0 +1,129 @@
+From 3afac4c6992006c31fa33fe351bf27eedc34be1c Mon Sep 17 00:00:00 2001
+From: nocjj <1250062498@qq.com>
+Date: Tue, 16 Mar 2021 16:23:23 +0800
+Subject: [PATCH] proc: del loop sscanf for proc pid stat file
+
+Loop sscanf and strtok will take a long cpu time, since
+get_proc_stat is called per thread. So, replace these with a single sscanf,
+which will save much cpu time.
+Signed-off-by: nocjj <1250062498@qq.com>
+---
+ src/proc.c | 73 +++++++++++++++++-------------------------------------
+ src/type.h |  2 +-
+ 2 files changed, 24 insertions(+), 51 deletions(-)
+
+diff --git a/src/proc.c b/src/proc.c
+index d33ede3..a722a92 100644
+--- a/src/proc.c
++++ b/src/proc.c
+@@ -19,46 +19,9 @@
+ #define STAT_PATH_SIZE 40
+ 
+ struct file_item proc_stab[] = {
+-#define GDF(f)   (void *)GET_NAME(f), (void *)DELTA_NAME(f), NULL
+-#define GF(f)    (void *)GET_NAME(f), NULL, NULL
+-    {"%c", GF(state)},
+-    {"%d", GF(ppid)},
+-    {"%d", GF(pgrd)},
+-    {"%*d", NULL, NULL, NULL},
+-    {"%*d", NULL, NULL, NULL},
+-    {"%*d", NULL, NULL, NULL},
+-    {"%lu", GF(flags)},
+-    {"%lu", GF(min_flt)},
+-    {"%lu", GF(cmin_flt)},
+-    {"%lu", GF(maj_flt)},
+-    {"%lu", GF(cmaj_flt)},
++#define GDF(f)   NULL, (void *)DELTA_NAME(f), NULL
+     {"%llu", GDF(utime)},
+-    {"%llu", GDF(stime)},
+-    {"%llu", GF(cutime)},
+-    {"%llu", GF(cstime)},
+-    {"%*ld", NULL, NULL, NULL},
+-    {"%*ld", NULL, NULL, NULL},
+-    {"%d", GF(nlwp)},
+-    {"%ld", GF(alarm)},
+-    {"%llu", GF(start_time)},
+-    {"%lu", GF(vsize)},
+-    {"%ld", GF(rss)},
+-    {"%lu", GF(rss_rlim)},
+-    {"%*lu", NULL, NULL, NULL},
+-    {"%*lu", NULL, NULL, NULL},
+-    {"%*lu", NULL, NULL, NULL},
+-    {"%*lu", NULL, NULL, NULL},
+-    {"%*lu", NULL, NULL, NULL},
+-    {"%*s", NULL, NULL, NULL},    /* discard signal */
+-    {"%*s", NULL, NULL, NULL},    /* discard blocked */
+-    {"%*s", NULL, NULL, NULL},    /* discard sigignore */
+-    {"%*s", NULL, NULL, NULL},    /* discard sigcatch */
+-    {"%*lu", NULL, NULL, NULL},
+-    {"%*u", NULL, NULL, NULL},    /* dsicard nswap */
+-    {"%*u", NULL, NULL, NULL},    /* discard cnswap */
+-    {"%*d", NULL, NULL, NULL},
+-    {"%d", GF(processor)}
+-#undef GF
++    {"%llu", GDF(stime)}
+ #undef GDF
+ };
+ 
+@@ -70,9 +33,6 @@ int get_proc_stat(struct domain *dom)
+     char path[STAT_PATH_SIZE];
+     char *tmp1 = NULL;
+     char *tmp2 = NULL;
+-    char *p = NULL;
+-    char *p_next = NULL;
+-    int i = 0;
+     int len;
+ 
+     if (dom->type == ISDOMAIN) {
+@@ -100,14 +60,27 @@ int get_proc_stat(struct domain *dom)
+     dom->vmname[len] = '\0';
+ 
+     /* read start from process state */
+-    tmp2 = tmp2 + 2;
+-    for (p = strtok_r(tmp2, " \t\r\n", &p_next); p && i < stat_size;
+-         p = strtok_r(NULL, " \t\r\n", &p_next)) {
+-        if (proc_stab[i].get_fun != NULL) {
+-            sscanf(p, proc_stab[i].format, (*proc_stab[i].get_fun)(dom));
+-        }
+-        ++i;
+-    }
++    sscanf(tmp2 + 2,
++           "%c "
++           "%d %d %*d %*d %*d "
++           "%lu "
++           "%lu %lu %lu %lu "
++           "%llu %llu %llu %llu "
++           "%*d %*d "
++           "%d %ld "
++           "%llu %lu %ld %lu "
++           "%*u %*u %*u %*u %*u "
++           "%*s %*s %*s %*s "
++           "%*u %*u %*u %*d "
++           "%d",
++           &(dom->state),
++           &(dom->ppid), &(dom->pgrd),
++           &(dom->flags),
++           &(dom->min_flt), &(dom->cmin_flt), &(dom->maj_flt), &(dom->cmaj_flt),
++           &(dom->utime), &(dom->stime), &(dom->cutime), &(dom->cstime),
++           &(dom->nlwp), &(dom->alarm),
++           &(dom->start_time), &(dom->vsize), &(dom->rss), &(dom->rss_rlim),
++           &(dom->processor));
+     return 1;
+ }
+ 
+diff --git a/src/type.h b/src/type.h
+index f5d148c..77dd696 100644
+--- a/src/type.h
++++ b/src/type.h
+@@ -86,7 +86,7 @@ struct domain {
+     long int
+         alarm,
+         rss;
+-    unsigned int
++    unsigned long
+         flags,
+         min_flt,
+         cmin_flt,
+-- 
+2.27.0
+