[doris] branch opt_perf updated: [Improvement](predicate) Replace for-loop by memcpy (#12879)

[yiguolei]

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yiguolei pushed a commit to branch opt_perf
in repository https://gitbox.apache.org/repos/asf/doris.git


The following commit(s) were added to refs/heads/opt_perf by this push:
     new 2b27aaa2fa [Improvement](predicate) Replace for-loop by memcpy (#12879)
2b27aaa2fa is described below

commit 2b27aaa2fa888ca2fe4634553034ea2f33e37ab4
Author: Gabriel <gabrielleeb...@gmail.com>
AuthorDate: Thu Sep 22 19:46:52 2022 +0800

    [Improvement](predicate) Replace for-loop by memcpy (#12879)
---
 be/src/vec/columns/predicate_column.h | 6 +-----
 1 file changed, 1 insertion(+), 5 deletions(-)

diff --git a/be/src/vec/columns/predicate_column.h 
b/be/src/vec/columns/predicate_column.h
index fd99d4c04b..d5ad52b6ac 100644
--- a/be/src/vec/columns/predicate_column.h
+++ b/be/src/vec/columns/predicate_column.h
@@ -133,13 +133,9 @@ private:
         }
     }
 
-    // note(wb): Write data one by one has a slight performance improvement 
than memcpy directly
     void insert_many_default_type(const char* data_ptr, size_t num) {
-        T* input_val_ptr = (T*)data_ptr;
         T* res_val_ptr = (T*)data.get_end_ptr();
-        for (int i = 0; i < num; i++) {
-            res_val_ptr[i] = input_val_ptr[i];
-        }
+        memcpy(res_val_ptr, data_ptr, num * sizeof(T));
         res_val_ptr += num;
         data.set_end_ptr(res_val_ptr);
     }


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