diff --git a/lsteamclient/gen_wrapper.py b/lsteamclient/gen_wrapper.py
index 433812a9..19f25737 100755
--- a/lsteamclient/gen_wrapper.py
+++ b/lsteamclient/gen_wrapper.py
@@ -7,6 +7,7 @@ CLANG_PATH='/usr/lib/clang/15'
 
 from clang.cindex import CursorKind, Index, Type, TypeKind
 from collections import namedtuple
+import concurrent.futures
 import os
 import re
 import math
@@ -98,6 +99,8 @@ SDK_VERSIONS = [
     "099u",
 ]
 
+ABIS = ['u32', 'u64', 'w32', 'w64']
+
 SDK_SOURCES = {
     "steam_api.h": [
         "ISteamApps",
@@ -1344,21 +1347,24 @@ def generate(sdkver, records):
 for i, sdkver in enumerate(SDK_VERSIONS):
     print(f'loading SDKs... {i * 100 // len(SDK_VERSIONS)}%', end='\r')
     all_versions[sdkver], all_sources[sdkver] = load(sdkver)
-print(u'loading SDKs... 100%')
+print('loading SDKs... 100%')
 
-for i, sdkver in enumerate(SDK_VERSIONS):
-    print(f'parsing SDKs... {i * 100 // len(SDK_VERSIONS)}%', end='\r')
-    sources = all_sources[sdkver]
-    records = {}
-    records['u32'] = parse(sources, 'u32')
-    records['u64'] = parse(sources, 'u64')
-    records['w32'] = parse(sources, 'w32')
-    records['w64'] = parse(sources, 'w64')
-    all_records[sdkver] = records
-print(u'parsing SDKs... 100%')
+with concurrent.futures.ThreadPoolExecutor() as executor:
+    arg0 = [sdkver for sdkver in SDK_VERSIONS for abi in ABIS]
+    arg1 = [abi for sdkver in SDK_VERSIONS for abi in ABIS]
+    def parse_map(sdkver, abi):
+        return sdkver, abi, parse(all_sources[sdkver], abi)
 
-for sdkver, records in all_records.items():
-    generate(sdkver, records)
+    results = executor.map(parse_map, arg0, arg1)
+    for i, result in enumerate(results):
+        print(f'parsing SDKs... {i * 100 // len(arg0)}%', end='\r')
+        sdkver, abi, index = result
+        if sdkver not in all_records: all_records[sdkver] = {}
+        all_records[sdkver][abi] = index
+print('parsing SDKs... 100%')
+
+for sdkver in SDK_VERSIONS:
+    generate(sdkver, all_records[sdkver])
 
 
 for f in cpp_files_need_close_brace: