diff --git a/cartridge/twophase.lua b/cartridge/twophase.lua
index c380e3bbc..f5517823a 100644
--- a/cartridge/twophase.lua
+++ b/cartridge/twophase.lua
@@ -134,8 +134,6 @@ end
 -- @treturn[2] nil
 -- @treturn[2] table Error description
 local function prepare_2pc(upload_id)
-    local fid = fiber.self():id()
-    local csw = fiber.info()[fid].csw
     local data
     if type(upload_id) == 'table' then
         -- Preserve compatibility with older versions.
@@ -179,11 +177,8 @@ local function prepare_2pc(upload_id)
         log.warn('%s', err)
         return nil, err
     end
-    local start = fiber.time64() /1e3
+
     local ok, err = ClusterwideConfig.save(clusterwide_config, path_prepare)
-    local finish = fiber.time64() /1e3
-    local dur = finish - start
-    log.info("duration of save: %d ms", tonumber(dur))
     if not ok and fio.path.exists(path_prepare) then
         err = Prepare2pcError:new('Two-phase commit is locked')
     end
@@ -193,7 +188,6 @@ local function prepare_2pc(upload_id)
         return nil, err
     end
     vars.prepared_config = clusterwide_config
-    log.info("prepare phase yields: %d", fiber.info()[fid].csw - csw)
 
     return true
 end