diff --git a/ww/generic_pool.h b/ww/generic_pool.h
index db2d282..8dc9087 100644
--- a/ww/generic_pool.h
+++ b/ww/generic_pool.h
@@ -75,7 +75,7 @@ static inline pool_item_t *popPoolItem(generic_pool_t *pool)
     pool->in_use += 1;
 #endif
 
-    if (pool->len > 0)
+    if (WW_LIKELY(pool->len > 0))
     {
         --(pool->len);
         return pool->available[pool->len];
diff --git a/ww/master_pool.h b/ww/master_pool.h
index 026285b..c647bac 100644
--- a/ww/master_pool.h
+++ b/ww/master_pool.h
@@ -17,31 +17,31 @@
                                 |-----------|
                                 |           |
                                 |           |
-                                |           | -------------> |---------------|
-                                |           |                | Worker 1 pools|
-                                |           | <------------- |---------------|
+                                |           | -------------> |----------------|
+                                |           |                | Worker 1 pools |
+                                |           | <------------- |----------------|
                                 |           |
                                 |           |
                                 |           |
                                 |           |
-                                |           | -------------> |---------------|
-                                |           |                | Worker 2 pools|
-                                |           | <------------- |---------------|
+                                |           | -------------> |----------------|
+                                |           |                | Worker 2 pools |
+                                |           | <------------- |----------------|
      |-----------|              |           |
      |  Malloc   | -----------> |  MASTER   |
      | --------  |              |           |
      |   Free    | <----------- |   POOL    |
      |-----------|              |           |
-                                |           | -------------> |---------------|
-                                |           |                | Worker 3 pools|
-                                |           | <------------- |---------------|
+                                |           | -------------> |----------------|
+                                |           |                | Worker 3 pools |
+                                |           | <------------- |----------------|
                                 |           |
                                 |           |
                                 |           |
                                 |           |
-                                |           | -------------> |---------------|
-                                |           |                | Worker 4 pools|
-                                |           | <------------- |---------------|
+                                |           | -------------> |----------------|
+                                |           |                | Worker 4 pools |
+                                |           | <------------- |----------------|
                                 |           |
                                 |           |
                                 |-----------|