basic profiler implementation

common/src/test/java/profiler/ProfilerTest.java

@@ -0,0 +1,45 @@
+package profiler;
+
+import com.dfsek.terra.profiler.Profiler;
+
+public class ProfilerTest {
+    //@Test
+    public static void main(String... a) throws InterruptedException {
+        Profiler.INSTANCE.start();
+        for(int i = 0; i < 100; i++) {
+            doThing();
+        }
+
+        for(int i = 0; i < 100; i++) {
+            doThirdOtherThing();
+        }
+
+        for(int i = 0; i < 100; i++) {
+            doOtherThing();
+        }
+        Profiler.INSTANCE.stop();
+        Profiler.INSTANCE.getTimings().forEach((id, timings) -> {
+            System.out.println(id + ": " + timings.toString());
+        });
+    }
+
+    private static void doThing() throws InterruptedException {
+        Profiler.INSTANCE.push("thing");
+        Thread.sleep(1);
+        doOtherThing();
+        Profiler.INSTANCE.pop("thing");
+    }
+
+    private static void doOtherThing() throws InterruptedException {
+        Profiler.INSTANCE.push("thing2");
+        Thread.sleep(2);
+        doThirdOtherThing();
+        Profiler.INSTANCE.pop("thing2");
+    }
+
+    private static void doThirdOtherThing() throws InterruptedException {
+        Profiler.INSTANCE.push("thing3");
+        Thread.sleep(2);
+        Profiler.INSTANCE.pop("thing3");
+    }
+}