use std::memcpy to copy array.

cc62b1c3 · Guolin Ke · 516e66a5 · cc62b1c3
Commit cc62b1c3 authored Mar 15, 2017 by Guolin Ke
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src/c_api.cpp src/c_api.cpp +1 -3

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--- a/src/c_api.cpp
+++ b/src/c_api.cpp
@@ -1140,9 +1140,7 @@ LIGHTGBM_C_EXPORT int LGBM_AllocateArray(int64_t len, int type, ArrayHandle* out
 template<typename T>
 void Copy(T* dst, const T* src, int64_t len) {
-  for (int64_t i = 0; i < len; ++i) {
+  std::memcpy(dst, src, sizeof(T) * len);
-    dst[i] = src[i];
-  }
 }
 LIGHTGBM_C_EXPORT int LGBM_CopyToArray(ArrayHandle arr, int type, int64_t start_idx, const void* src, int64_t len) {