v2.0 #major

Author: dlidstrom

README.md

@@ -6,7 +6,11 @@
 
 **Updates:**
 
-- 🔥 v1.2 support for reporting in json format (thanks [@cgkantidis](https://github.com/cgkantidis)!)
+- 🔥 **v2.0 has been released!**\
+  🚀 Duplo just got a major speed boost! With new
+  multithreading support, it now takes full advantage of modern CPUs to scan and
+  detect duplicates faster than ever ⚡️ (thanks [@cgkantidis](https://github.com/cgkantidis)!)
+- v1.2 support for reporting in json format (thanks [@cgkantidis](https://github.com/cgkantidis)!)
   - [Performance improvements](#71-performance-measurements): it now takes ~9s to process Quake 2 source! (thanks [@cgkantidis](https://github.com/cgkantidis)!)
   - refactored xml/json reports for improved maintainability
 - Introducing [duplo-action](https://github.com/dlidstrom/duplo-action) for using Duplo in GitHub Actions!
@@ -231,6 +235,9 @@ for further information.
 This was measured on modern hardware anno 2025. It means Duplo is able to
 process more than 10 thousand lines of code (or ~30 files) per second.
 
+> Note that this is single-threaded performance. Duplo now supports using
+> multiple threads (`-j` option) with an almost linear performance improvement.
+
 ## 8. Developing
 
 ### 8.1. Unix

src/Main.cpp

@@ -48,7 +48,7 @@ namespace {
             std::cout << "       Duplo " << VERSION << " - duplicate source code block finder\n\n";
 
             std::cout << "\nSYNOPSIS\n";
-            std::cout << "       duplo [OPTIONS] [INTPUT_FILELIST] [OUTPUT_FILE]\n";
+            std::cout << "       duplo [OPTIONS] [INPUT_FILELIST] [OUTPUT_FILE]\n";
 
             std::cout << "\nDESCRIPTION\n";
             std::cout << "       Duplo is a tool to find duplicated code blocks in large\n";
@@ -61,6 +61,7 @@ namespace {
             std::cout << "       -mc              minimal characters in line (default is " << MIN_CHARS << ")\n";
             std::cout << "                        lines with less characters are ignored\n";
             std::cout << "       -n               only report for first N files\n";
+            std::cout << "       -j               number of threads to use (default is 1)\n";
             std::cout << "       -ip              ignore preprocessor directives\n";
             std::cout << "       -d               ignore file pairs with same name\n";
             std::cout << "       -xml             output file in XML\n";
@@ -76,6 +77,7 @@ namespace {
                 "       Daniel Lidstrom ([email protected])",
                 "       Christian M. Ammann ([email protected])",
                 "       Trevor D'Arcy-Evans ([email protected])",
+                "       Christos Gkantidis ([email protected])"
             };
             std::copy(std::begin(authors), std::end(authors), std::ostream_iterator<const char*>(std::cout, "\n"));
             std::cout << "\n";

src/compile_flags.txt

@@ -4,3 +4,5 @@
 include/
 -I
 ../build/_deps/nlohmann_json-src/single_include/
+-I
+../build/_deps/thread_pool-src/include/