try to use JSON::MaybeXS wrapper for chance of better performance + open code

OpenWeatherMapAPI.pm

@@ -39,16 +39,84 @@ use warnings;
 use POSIX;
 use HttpUtils;
 
+# try to use JSON::MaybeXS wrapper
+#   for chance of better performance + open code
+eval {
+    require JSON::MaybeXS;
+    import JSON::MaybeXS qw( decode_json encode_json );
+    1;
+};
+
+if ($@) {
+    $@ = undef;
+
+    # try to use JSON wrapper
+    #   for chance of better performance
+    eval {
+
+        # JSON preference order
+        local $ENV{PERL_JSON_BACKEND} =
+          'Cpanel::JSON::XS,JSON::XS,JSON::PP,JSON::backportPP'
+          unless ( defined( $ENV{PERL_JSON_BACKEND} ) );
+
+        require JSON;
+        import JSON qw( decode_json encode_json );
+        1;
+    };
+
+    if ($@) {
+        $@ = undef;
+
+        # In rare cases, Cpanel::JSON::XS may
+        #   be installed but JSON|JSON::MaybeXS not ...
+        eval {
+            require Cpanel::JSON::XS;
+            import Cpanel::JSON::XS qw(decode_json encode_json);
+            1;
+        };
+
+        if ($@) {
+            $@ = undef;
+
+            # In rare cases, JSON::XS may
+            #   be installed but JSON not ...
+            eval {
+                require JSON::XS;
+                import JSON::XS qw(decode_json encode_json);
+                1;
+            };
+
+            if ($@) {
+                $@ = undef;
+
+                # Fallback to built-in JSON which SHOULD
+                #   be available since 5.014 ...
+                eval {
+                    require JSON::PP;
+                    import JSON::PP qw(decode_json encode_json);
+                    1;
+                };
+
+                if ($@) {
+                    $@ = undef;
+
+                    # Fallback to JSON::backportPP in really rare cases
+                    require JSON::backportPP;
+                    import JSON::backportPP qw(decode_json encode_json);
+                    1;
+                }
+            }
+        }
+    }
+}
+
 my $missingModul = '';
-eval "use JSON;1"
-  or $missingModul .=
-  "JSON ";    # apt-get install libperl-JSON on Debian and derivatives
 eval "use Encode qw(encode_utf8);1" or $missingModul .= "Encode ";
 
 # use Data::Dumper;    # for Debug only
 ## API URL
 use constant URL     => 'https://api.openweathermap.org/data/2.5/';
-use constant VERSION => '0.2.5';
+use constant VERSION => '0.4.0';
 ## URL . 'weather?' for current data
 ## URL . 'forecast?' for forecast data