Add environment reporter

timings/src/main/java/com/ankurm/vectorapi/Env.java

@@ -0,0 +1,24 @@
+package com.ankurm.vectorapi;
+
+import jdk.incubator.vector.*;
+
+/** Prints the exact environment a benchmark run happened on. */
+public final class Env {
+    public static void print() {
+        Runtime rt = Runtime.getRuntime();
+        System.out.println("=== environment ===");
+        System.out.println("JDK            : " + System.getProperty("java.vm.name")
+                + " " + System.getProperty("java.vm.version"));
+        System.out.println("java.version   : " + System.getProperty("java.version"));
+        System.out.println("OS             : " + System.getProperty("os.name") + " "
+                + System.getProperty("os.version") + " (" + System.getProperty("os.arch") + ")");
+        System.out.println("Available procs: " + rt.availableProcessors());
+        System.out.println("Preferred spec : " + FloatVector.SPECIES_PREFERRED
+                + "  (" + FloatVector.SPECIES_PREFERRED.length() + " float lanes, "
+                + FloatVector.SPECIES_PREFERRED.vectorBitSize() + "-bit)");
+        System.out.println("Max vector size: " + IntVector.SPECIES_PREFERRED.vectorBitSize() + "-bit (int)");
+        System.out.println();
+    }
+
+    private Env() {}
+}