diff --git a/ChangeLog.md b/ChangeLog.md
index 84e80406..3266920f 100644
--- a/ChangeLog.md
+++ b/ChangeLog.md
@@ -22,6 +22,7 @@
     *   #272: Supported a binary mode in HTTP.
     *   #273: Supported `read`/`write` in `File`.
     *   #290: Supported `chmod` in `File`.
+    *   #308: Improvement of the stack usage.
     *   Small improvements and enhancements as follows without managing by issues.
         *   Supported SemanticVersion class with `using SemanticVersion;`.
         *   Supported putting a comma at the end of an argument's list for both declaration and calling.
diff --git a/ChangeLog_v1.0.x.md b/ChangeLog_v1.0.x.md
index fe90be67..703b1b4c 100644
--- a/ChangeLog_v1.0.x.md
+++ b/ChangeLog_v1.0.x.md
@@ -2,6 +2,10 @@
 
 ## V1.0.3 (Current Development Version)
 
+*   Improvements
+    *   #308: Improvement of the stack usage.
+    *   Some feedbacks from V1.1.0.
+        *   Supported putting a comma at the end of an argument's list for both declaration and calling.
 *   Bug Fixed
     *   #302: Fixed a prblem of the string optimization.
     *   #305: Fixed a prblem of no POPC in try.
diff --git a/include/kxastobject.h b/include/kxastobject.h
index 8a7f5cbc..24b9173c 100644
--- a/include/kxastobject.h
+++ b/include/kxastobject.h
@@ -61,6 +61,7 @@ extern kx_object_t *kx_gen_texpr_object(kx_object_t *lhs, kx_object_t *rhs, kx_o
 extern kx_object_t *kx_gen_stmt_object(int type, kx_object_t *lhs, kx_object_t *rhs, kx_object_t *ex);
 extern kx_object_t *kx_gen_stmt_object_line(int type, kx_object_t *lhs, kx_object_t *rhs, kx_object_t *ex, int line);
 extern kx_object_t *kx_gen_modifier(kx_object_t *modifier, kx_object_t *stmt);
+extern kx_object_t *kx_gen_try_stmt_object(kx_object_t *lhs, kx_object_t *rhs, kx_object_t *ex);
 extern kx_object_t *kx_gen_case_stmt_object(int optional, kx_object_t *lhs);
 extern kx_object_t *kx_gen_break_object(int type, const char *name);
 extern kx_object_t *kx_gen_label_object(int type, const char *name, kx_object_t *lhs);
diff --git a/src/ast_object.c b/src/ast_object.c
index f6433da4..cca1f407 100644
--- a/src/ast_object.c
+++ b/src/ast_object.c
@@ -628,6 +628,11 @@ kx_object_t *kx_gen_modifier(kx_object_t *modifier, kx_object_t *stmt)
     return stmt;
 }
 
+kx_object_t *kx_gen_try_stmt_object(kx_object_t *lhs, kx_object_t *rhs, kx_object_t *ex)
+{
+    return kx_gen_stmt_object(KXST_TRY, lhs, rhs, ex ? ex : kx_gen_block_object(NULL));
+}
+
 kx_object_t *kx_gen_case_stmt_object(int optional, kx_object_t *lhs)
 {
     return kx_gen_obj(KXST_CASE, optional, lhs, NULL, NULL);
diff --git a/src/kinx.y b/src/kinx.y
index 5d726fb2..57ff3399 100644
--- a/src/kinx.y
+++ b/src/kinx.y
@@ -337,7 +337,7 @@ ForInVariable
     ;
 
 TryCatchStatement
-    : TRY BlockStatement CatchStatement_Opt FinallyStatement_Opt { $$ = kx_gen_stmt_object(KXST_TRY, $2, $3, $4); }
+    : TRY BlockStatement CatchStatement_Opt FinallyStatement_Opt { $$ = kx_gen_try_stmt_object($2, $3, $4); }
     ;
 
 CatchStatement_Opt
@@ -351,8 +351,8 @@ CatchVariable
     ;
 
 FinallyStatement_Opt
-    : { $$ = kx_gen_block_object(NULL); }
-    | FINALLY BlockStatement { $$ = ($2 == NULL) ? kx_gen_block_object(NULL) : $2; }
+    : { $$ = NULL; }
+    | FINALLY BlockStatement { $$ = $2; }
     ;
 
 BreakStatement
diff --git a/src/parser.c b/src/parser.c
index 1572dc8f..b9d2593d 100644
--- a/src/parser.c
+++ b/src/parser.c
@@ -2139,7 +2139,7 @@ int yyparse(YYPARSE_ARG)
 { yyval.obj = kx_gen_forin_object(YYASP(4-8).obj, YYASP(6-8).obj, YYASP(8-8).obj, 1); } break;
         case 78:
 #line 340 "src/kinx.y"
-{ yyval.obj = kx_gen_stmt_object(KXST_TRY, YYASP(2-4).obj, YYASP(3-4).obj, YYASP(4-4).obj); } break;
+{ yyval.obj = kx_gen_try_stmt_object(YYASP(2-4).obj, YYASP(3-4).obj, YYASP(4-4).obj); } break;
         case 79:
 #line 344 "src/kinx.y"
 { yyval.obj = NULL; } break;
@@ -2154,10 +2154,10 @@ int yyparse(YYPARSE_ARG)
 { yyval.obj = kx_gen_var_object_line_pos(YYASP(2-3).strinfo.name, KX_UNKNOWN_T, YYASP(2-3).strinfo.line, YYASP(2-3).strinfo.pos1, YYASP(2-3).strinfo.pos2); } break;
         case 83:
 #line 354 "src/kinx.y"
-{ yyval.obj = kx_gen_block_object(NULL); } break;
+{ yyval.obj = NULL; } break;
         case 84:
 #line 355 "src/kinx.y"
-{ yyval.obj = (YYASP(2-2).obj == NULL) ? kx_gen_block_object(NULL) : YYASP(2-2).obj; } break;
+{ yyval.obj = YYASP(2-2).obj; } break;
         case 85:
 #line 359 "src/kinx.y"
 { yyval.obj = kx_gen_modifier(YYASP(2-3).obj, kx_gen_break_object(KXST_BREAK, NULL)); } break;