Improve as_traceback performance

AUTHORS.rst

@@ -13,3 +13,4 @@ Authors
 * Alisa Sireneva - https://github.com/purplesyringa
 * Michał Górny - https://github.com/mgorny
 * Tim Maxwell - https://github.com/tmaxwell-anthropic
+* Haoyu Weng - https://github.com/wengh

src/tblib/__init__.py

@@ -1,6 +1,5 @@
 import re
 import sys
-from types import CodeType
 
 __version__ = '3.0.0'
 __all__ = 'Traceback', 'TracebackParseError', 'Frame', 'Code'
@@ -117,30 +116,21 @@ def as_traceback(self):
         current = self
         top_tb = None
         tb = None
+        stub = compile(
+            'raise __traceback_maker',
+            '<string>',
+            'exec',
+        )
         while current:
             f_code = current.tb_frame.f_code
-            code = compile('\n' * (current.tb_lineno - 1) + 'raise __traceback_maker', current.tb_frame.f_code.co_filename, 'exec')
-            if hasattr(code, 'replace'):
-                # Python 3.8 and newer
-                code = code.replace(co_argcount=0, co_filename=f_code.co_filename, co_name=f_code.co_name, co_freevars=(), co_cellvars=())
-            else:
-                code = CodeType(
-                    0,
-                    code.co_kwonlyargcount,
-                    code.co_nlocals,
-                    code.co_stacksize,
-                    code.co_flags,
-                    code.co_code,
-                    code.co_consts,
-                    code.co_names,
-                    code.co_varnames,
-                    f_code.co_filename,
-                    f_code.co_name,
-                    code.co_firstlineno,
-                    code.co_lnotab,
-                    (),
-                    (),
-                )
+            code = stub.replace(
+                co_firstlineno=current.tb_lineno,
+                co_argcount=0,
+                co_filename=f_code.co_filename,
+                co_name=f_code.co_name,
+                co_freevars=(),
+                co_cellvars=(),
+            )
 
             # noinspection PyBroadException
             try:

tests/test_tblib.py

@@ -111,6 +111,18 @@ def test_parse_traceback():
     assert tb4.as_dict() == tb3.as_dict() == tb2.as_dict() == tb1.as_dict() == expected_dict
 
 
+def test_large_line_number():
+    line_number = 2**31 - 1
+    tb1 = Traceback.from_string(
+        f"""
+Traceback (most recent call last):
+  File "file1", line {line_number}, in <module>
+    code1
+"""
+    ).as_traceback()
+    assert tb1.tb_lineno == line_number
+
+
 def test_pytest_integration(testdir):
     test = testdir.makepyfile(
         """