redis and bechmark classes

+<?php
+
+namespace Tz\WordPress\Tools;
+
+class TZBenchMark {
+
+    protected static $start_micro = 0;
+    protected static $end_micro = 0;
+
+    static function startTimer() {
+        self::$start_micro = microtime(true);
+    }
+
+    static function endTimer() {
+        self::$end_micro = microtime(true);
+    }
+
+    static function logTimer($prepend = "TZBENCHMARK TIME ====== ") {
+        error_log($prepend.(self::$end_micro - self::$start_micro)." seconds");
+    }
+
+}
\ No newline at end of file

+<?php
+
+namespace Tz\WordPress\Tools;
+
+use Throwable;
+use Predis;
+
+class TZRedis {
+
+    protected static $redis = null;
+    private static $err = "TZRedis !!! ";
+
+    private static function connectInstance() {
+
+        try {
+
+            if(!self::$redis) {
+                self::$redis = new Predis\Client();
+            }
+
+        } catch(Throwable $e) {
+            error_log(self::$err.$e->getMessage());
+        }
+    }
+
+    static function set($key, $val, $expire = 60) {
+        try {
+
+            self::connectInstance();
+
+            if(self::$redis) {
+                self::$redis->set($key, $val, 'ex', $expire);
+            }
+            
+        }catch (Throwable $e) {
+            error_log(self::$err."Failed to set ".$key." with ".$val);
+        }
+    }
+
+    static function get($key, $unserialize = false) {
+        try {
+
+            self::connectInstance();
+
+            if(self::$redis) {
+                if($unserialize) {
+                    unserialize(self::$redis->get($key));
+                } else {
+                    return self::$redis->get($key);
+                }
+            }
+
+        }catch (Throwable $e) {
+            error_log(self::$err."Failed to get ".$key);
+        }
+    }
+
+    static function exists($key) {
+        try {
+
+            self::connectInstance();
+
+            if(self::$redis) {
+               return self::$redis->exists($key);
+            }
+
+        }catch (Throwable $e) {
+            error_log(self::$err.$e->getMessage());
+        }
+    }
+
+    static function clear($key) {
+        try {
+
+            self::connectInstance();
+
+            if(self::$redis) {
+               return self::$redis->delete($key);
+            }
+
+        }catch (Throwable $e) {
+            error_log(self::$err.$e->getMessage());
+        }
+    }
+
+
+}
\ No newline at end of file