.htaccess: Site speed improvements

.htaccess

# Expires Caching #
    <IfModule mod_expires.c>
        ExpiresActive On
        ExpiresByType image/jpg "access 1 year"
        ExpiresByType image/jpeg "access 1 year"
        ExpiresByType image/gif "access 1 year"
        ExpiresByType image/png "access 1 year"
        ExpiresByType image/svg+xml "access 1 year"
        ExpiresByType text/css "access 1 month"
        ExpiresByType application/pdf "access 1 month"
        ExpiresByType text/x-javascript "access 1 month"
        ExpiresByType application/x-shockwave-flash "access 1 month"
        ExpiresByType image/x-icon "access 1 year"
        ExpiresDefault "access 2 days"
    </IfModule>

# Caching - 7 days
    <FilesMatch "\.(js|css|jpg|png|jpeg|gif|xml|json|txt|pdf|mov|avi|otf|woff|ico|swf)$">
        Header set Cache-Control "max-age=604800, public"
    </FilesMatch>

# http://codex.wordpress.org/Output_Compression
    <IfModule mod_deflate.c>
    # Insert filters
    AddOutputFilterByType DEFLATE text/plain
    AddOutputFilterByType DEFLATE text/html
    AddOutputFilterByType DEFLATE text/xml
    AddOutputFilterByType DEFLATE text/css
    AddOutputFilterByType DEFLATE application/xml
    AddOutputFilterByType DEFLATE application/xhtml+xml
    AddOutputFilterByType DEFLATE application/rss+xml
    AddOutputFilterByType DEFLATE application/javascript
    AddOutputFilterByType DEFLATE application/x-javascript
    AddOutputFilterByType DEFLATE application/x-httpd-php
    AddOutputFilterByType DEFLATE application/x-httpd-fastphp
    AddOutputFilterByType DEFLATE image/svg+xml

    # Drop problematic browsers
    BrowserMatch ^Mozilla/4 gzip-only-text/html
    BrowserMatch ^Mozilla/4\.0[678] no-gzip
    BrowserMatch \bMSI[E] !no-gzip !gzip-only-text/html

    # Make sure proxies don't deliver the wrong content
    Header append Vary User-Agent env=!dont-vary
    </IfModule>

# Vary Accept-Encoding
    <IfModule mod_headers.c>
        <FilesMatch "\.(js|css|jpg|png|jpeg|gif|xml|json|txt|pdf|mov|avi|otf|woff|ico|swf)$">
            Header append Vary: Accept-Encoding
        </FilesMatch>
    </IfModule>

# Cookieless domain for these filetypes
    <FilesMatch "\.(js|css|jpg|png|jpeg|gif|xml|json|txt|pdf|mov|avi|otf|woff|ico|swf)$">
        RequestHeader unset Cookie
        Header unset Cookie
        Header unset Set-Cookie
    </FilesMatch>