diff --git a/native/jni/src/correction.cpp b/native/jni/src/correction.cpp
index afeda48..5f630f0 100644
--- a/native/jni/src/correction.cpp
+++ b/native/jni/src/correction.cpp
@@ -16,6 +16,8 @@
 
 #define LOG_TAG "LatinIME: correction.cpp"
 
+#include <cmath>
+
 #include "char_utils.h"
 #include "correction.h"
 #include "defines.h"
diff --git a/native/jni/src/defines.h b/native/jni/src/defines.h
index 4e0c570..c89a870 100644
--- a/native/jni/src/defines.h
+++ b/native/jni/src/defines.h
@@ -23,6 +23,11 @@
 #define AK_FORCE_INLINE inline
 #endif // __GNUC__
 
+#if defined(FLAG_DO_PROFILE) || defined(FLAG_DBG)
+#undef AK_FORCE_INLINE
+#define AK_FORCE_INLINE inline
+#endif // defined(FLAG_DO_PROFILE) || defined(FLAG_DBG)
+
 // Must be identical to Constants.Dictionary.MAX_WORD_LENGTH in Java
 #define MAX_WORD_LENGTH 48
 // Must be identical to BinaryDictionary.MAX_RESULTS in Java
@@ -32,7 +37,7 @@
 #include <android/log.h>
 #ifndef LOG_TAG
 #define LOG_TAG "LatinIME: "
-#endif
+#endif // LOG_TAG
 #define AKLOGE(fmt, ...) __android_log_print(ANDROID_LOG_ERROR, LOG_TAG, fmt, ##__VA_ARGS__)
 #define AKLOGI(fmt, ...) __android_log_print(ANDROID_LOG_INFO, LOG_TAG, fmt, ##__VA_ARGS__)
 
@@ -110,14 +115,14 @@
     }
     free(strs);
 }
-#else
+#else // __ANDROID__
 #include <cassert>
 #define DO_ASSERT_TEST
 #define ASSERT(success) assert(success)
 #define SHOW_STACK_TRACE
-#endif
+#endif // __ANDROID__
 
-#else
+#else // defined(FLAG_DO_PROFILE) || defined(FLAG_DBG)
 #define AKLOGE(fmt, ...)
 #define AKLOGI(fmt, ...)
 #define DUMP_RESULT(words, frequencies)
@@ -126,7 +131,7 @@
 #define ASSERT(success)
 #define SHOW_STACK_TRACE
 #define INTS_TO_CHARS(input, length, output)
-#endif
+#endif // defined(FLAG_DO_PROFILE) || defined(FLAG_DBG)
 
 #ifdef FLAG_DO_PROFILE
 // Profiler
diff --git a/native/jni/src/geometry_utils.h b/native/jni/src/geometry_utils.h
index 4060a7b..4bff80f 100644
--- a/native/jni/src/geometry_utils.h
+++ b/native/jni/src/geometry_utils.h
@@ -21,8 +21,6 @@
 
 #include "defines.h"
 
-#define DEBUG_DECODER false
-
 #define M_PI_F 3.14159265f
 #define ROUND_FLOAT_10000(f) ((f) < 1000.0f && (f) > 0.001f) \
         ? (floorf((f) * 10000.0f) / 10000.0f) : (f)
@@ -36,19 +34,8 @@
     return SQUARE_FLOAT(x1 - x2) + SQUARE_FLOAT(y1 - y2);
 }
 
-static inline float getNormalizedSquaredDistanceFloat(const float x1, const float y1,
-        const float x2, const float y2, const float scale) {
-    return getSquaredDistanceFloat(x1, y1, x2, y2) / SQUARE_FLOAT(scale);
-}
-
-static inline float getDistanceFloat(const float x1, const float y1, const float x2,
-        const float y2) {
-    return hypotf(x1 - x2, y1 - y2);
-}
-
 static AK_FORCE_INLINE int getDistanceInt(const int x1, const int y1, const int x2, const int y2) {
-    return static_cast<int>(getDistanceFloat(static_cast<float>(x1), static_cast<float>(y1),
-            static_cast<float>(x2), static_cast<float>(y2)));
+    return static_cast<int>(hypotf(static_cast<float>(x1 - x2), static_cast<float>(y1 - y2)));
 }
 
 static AK_FORCE_INLINE float getAngle(const int x1, const int y1, const int x2, const int y2) {
diff --git a/native/jni/src/proximity_info.cpp b/native/jni/src/proximity_info.cpp
index 8ad9c77..9b99554 100644
--- a/native/jni/src/proximity_info.cpp
+++ b/native/jni/src/proximity_info.cpp
@@ -144,7 +144,7 @@
     const float touchX = static_cast<float>(x);
     const float touchY = static_cast<float>(y);
     const float keyWidth = static_cast<float>(getMostCommonKeyWidth());
-    return getNormalizedSquaredDistanceFloat(centerX, centerY, touchX, touchY, keyWidth);
+    return getSquaredDistanceFloat(centerX, centerY, touchX, touchY) / SQUARE_FLOAT(keyWidth);
 }
 
 int ProximityInfo::squaredDistanceToEdge(const int keyId, const int x, const int y) const {
diff --git a/native/jni/src/proximity_info_state.cpp b/native/jni/src/proximity_info_state.cpp
index 2e89e9a..d0cc4ac 100644
--- a/native/jni/src/proximity_info_state.cpp
+++ b/native/jni/src/proximity_info_state.cpp
@@ -20,6 +20,7 @@
 #define LOG_TAG "LatinIME: proximity_info_state.cpp"
 
 #include "defines.h"
+#include "geometry_utils.h"
 #include "proximity_info.h"
 #include "proximity_info_state.h"
 
diff --git a/native/jni/src/proximity_info_state.h b/native/jni/src/proximity_info_state.h
index 49c33e5..c8d417d 100644
--- a/native/jni/src/proximity_info_state.h
+++ b/native/jni/src/proximity_info_state.h
@@ -24,7 +24,6 @@
 
 #include "char_utils.h"
 #include "defines.h"
-#include "geometry_utils.h"
 #include "hash_map_compat.h"
 
 namespace latinime {