diff --git a/work/week10/a.out.dSYM/Contents/Info.plist b/work/week10/a.out.dSYM/Contents/Info.plist
new file mode 100644
index 0000000..3679a65
--- /dev/null
+++ b/work/week10/a.out.dSYM/Contents/Info.plist
@@ -0,0 +1,20 @@
+
+
+
+
+ CFBundleDevelopmentRegion
+ English
+ CFBundleIdentifier
+ com.apple.xcode.dsym.a.out
+ CFBundleInfoDictionaryVersion
+ 6.0
+ CFBundlePackageType
+ dSYM
+ CFBundleSignature
+ ????
+ CFBundleShortVersionString
+ 1.0
+ CFBundleVersion
+ 1
+
+
diff --git a/work/week10/test_speed.cc b/work/week10/test_speed.cc
new file mode 100644
index 0000000..e82107b
--- /dev/null
+++ b/work/week10/test_speed.cc
@@ -0,0 +1,12 @@
+#include
+
+int foo(const int &i) {return i + 18;}
+
+int main(){
+ unsigned long res = 0;
+ for (long i = 1; i < 1000000000; ++i){
+ res += i + foo(i);
+ }
+ std::cout << "Hello, World!" << res << std::endl;
+ return 0;
+}
\ No newline at end of file