diff --git a/common/src/tfe_future.cpp b/common/src/tfe_future.cpp
index 877f209..8f7cc69 100644
--- a/common/src/tfe_future.cpp
+++ b/common/src/tfe_future.cpp
@@ -21,6 +21,7 @@ struct future_promise_instance
 	MESA_htable_handle name_table;
 	char statsd_server_ip[256];
 	int statsd_server_port;
+	enum field_calc_algo favorite;
 	char histogram_bins[256];
 	screen_stat_handle_t fs_handle;
 };
@@ -63,6 +64,7 @@ void future_promise_library_init(const char* profile)
 
 	int value=0;
 	memset(&g_FP_instance,0,sizeof(g_FP_instance));
+	g_FP_instance.favorite=FS_CALC_SPEED;
 	strcpy(g_FP_instance.histogram_bins, FP_HISTOGRAM_BINS);
 	if(profile!=NULL)
 	{
@@ -72,8 +74,12 @@ void future_promise_library_init(const char* profile)
 		MESA_load_profile_int_def(profile, "STAT", "statsd_port", &(g_FP_instance.statsd_server_port), 0);
 		MESA_load_profile_string_def(profile, "STAT", "histogram_bins",
 			g_FP_instance.histogram_bins, sizeof(g_FP_instance.histogram_bins), FP_HISTOGRAM_BINS);
-
-
+		MESA_load_profile_int_def(profile, "STAT", "print_diff",
+			&value, 1);
+		if(value==0)
+		{
+			g_FP_instance.favorite=FS_CALC_CURRENT;
+		}
 	}
 	if(g_FP_instance.no_stats)
 	{		
@@ -114,7 +120,7 @@ void future_promise_library_init(const char* profile)
 		FS_set_para(fs, STATS_SERVER_PORT, &(g_FP_instance.statsd_server_port), sizeof(g_FP_instance.statsd_server_port));
 	}
 	FS_set_para(fs, HISTOGRAM_GLOBAL_BINS, g_FP_instance.histogram_bins, strlen(g_FP_instance.histogram_bins)+1);
-	g_FP_instance.fsid_f_num=FS_register(fs, FS_STYLE_FIELD, FS_CALC_CURRENT, "futures");
+	g_FP_instance.fsid_f_num=FS_register(fs, FS_STYLE_FIELD, g_FP_instance.favorite, "futures");
 	FS_start(fs);
 	g_FP_instance.fs_handle=fs;
 	g_is_FP_init=1;
@@ -165,11 +171,11 @@ static long field_get_set_cb(void * data, const uchar * key, uint size, void * u
 	{
 		field_id=(int*)malloc(sizeof(int)*2);
 		snprintf(buff,sizeof(buff),"%s(ms)",(char*)key);
-		field_id[0]=FS_register_histogram(args->fs_handle, FS_CALC_SPEED, buff,
+		field_id[0]=FS_register_histogram(args->fs_handle, g_FP_instance.favorite, buff,
 										1, 30*1000,3);
 		args->fsid_latency=field_id[0];
 		snprintf(buff,sizeof(buff),"%s%s",(char*)key,fail_str);
-		field_id[1]=FS_register(args->fs_handle, FS_STYLE_FIELD, FS_CALC_SPEED,buff);
+		field_id[1]=FS_register(args->fs_handle, FS_STYLE_FIELD, g_FP_instance.favorite, buff);
 		args->fsid_failed=field_id[1];
 		ret = MESA_htable_add(args->htable, key, size, (void*)field_id);
 		assert(ret>=0);
diff --git a/plugin/business/pangu-http/src/pangu_http.cpp b/plugin/business/pangu-http/src/pangu_http.cpp
index b4c3cae..d4ffe81 100644
--- a/plugin/business/pangu-http/src/pangu_http.cpp
+++ b/plugin/business/pangu-http/src/pangu_http.cpp
@@ -1224,7 +1224,7 @@ void cache_pend(const struct tfe_http_session * session,	unsigned int thread_id,
 }
 void cache_read(const struct tfe_http_session * session,	unsigned int thread_id, struct pangu_http_ctx * ctx)
 {
-	ctx->f_cache_query=future_create("cache_get", cache_read_on_succ, cache_read_on_fail, ctx);
+	ctx->f_cache_query=future_create("cache_read", cache_read_on_succ, cache_read_on_fail, ctx);
 	int ret=web_cache_async_read(g_pangu_rt->cache, thread_id, session->req, &(ctx->cmid), ctx->f_cache_query);
 	if(ret==0)
 	{
diff --git a/plugin/business/pangu-http/src/pangu_web_cache.cpp b/plugin/business/pangu-http/src/pangu_web_cache.cpp
index 1c0f82c..551214a 100644
--- a/plugin/business/pangu-http/src/pangu_web_cache.cpp
+++ b/plugin/business/pangu-http/src/pangu_web_cache.cpp
@@ -1164,7 +1164,7 @@ int web_cache_async_read(struct cache_handle* handle, unsigned int thread_id,
 	promise_set_ctx(p, query_ctx, cache_query_ctx_free_cb);
 	
 	ATOMIC_INC(&(handle->stat_val[STAT_CACHE_READING]));	
-	query_ctx->f_tango_cache_fetch=future_create("_cache_get", cache_query_obj_on_succ, cache_query_obj_on_fail, p);
+	query_ctx->f_tango_cache_fetch=future_create("_cache_read", cache_query_obj_on_succ, cache_query_obj_on_fail, p);
 	int ret=tango_cache_fetch_object(handle->clients[thread_id], query_ctx->f_tango_cache_fetch, &meta);
 	if(ret<0)
 	{
@@ -1311,7 +1311,7 @@ struct cache_update_context* web_cache_write_start(struct cache_handle* handle,
 	_cache_put_ctx->url=tfe_strdup(session->req->req_spec.url);
 	_cache_put_ctx->start=time(NULL);
 	_cache_put_ctx->ref_handle=handle;
-	_cache_put_ctx->f=future_create("cache_put", wrap_cache_write_on_succ, wrap_cache_write_on_fail, _cache_put_ctx);
+	_cache_put_ctx->f=future_create("_cache_wrt", wrap_cache_write_on_succ, wrap_cache_write_on_fail, _cache_put_ctx);
 	write_ctx=tango_cache_update_start(handle->clients[thread_id], _cache_put_ctx->f, &meta);
 	if(write_ctx==NULL)//exceed maximum cache memory size.
 	{