Go to Magento System –> Cache Management –>
Change Below type
Enable :
Configuration, Layouts, Blocks HTML output, Translations
Disable :
Collections Data, EAV types and attributes, Web Services Configuration
Then Change you httaccess file inside below code:
############################################
## enable apache served files compression
## http://developer.yahoo.com/performance/rules.html#gzip
# Insert filter
SetOutputFilter DEFLATE
# Netscape 4.x has some problems…
BrowserMatch ^Mozilla/4 gzip-only-text/html
# Netscape 4.06-4.08 have some more problems
BrowserMatch ^Mozilla/4.0[678] no-gzip
# MSIE masquerades as Netscape, but it is fine
BrowserMatch bMSIE !no-gzip !gzip-only-text/html
# Don’t compress images
SetEnvIfNoCase Request_URI .(?:gif|jpe?g|png)$ no-gzip dont-vary
# Make sure proxies don’t deliver the wrong content
Header append Vary User-Agent env=!dont-vary
# enable resulting html compression
php_flag zlib.output_compression on
More Information below Site URL :
http://inchoo.net/ecommerce/magento/boost-the-speed-of-your-magento/
And Change your memory in .htaccess file inside :
php_value memory_limit 128M
And More Information here :
http://www.gxjansen.com/101-ways-to-speed-up-your-magento-e-commerce-website/