AAM gives very slow site performance and page load time

According to the results from P3 plugin profiler AAM takes more than 50% (alone) of the total page load time, is this normal?

Results from P3 plugin profiler:

WordPress Plugin Profile Report =========================================== Report date: April 16, 2014 Theme name: Superstore Pages browsed: 1 Avg. load time: 7.6873 sec Number of plugins: 28 Plugin impact: 75.37% of load time Avg. plugin time: 5.7937 sec Avg. core time: 0.8071 sec Avg. theme time: 0.5550 sec Avg. mem usage: 94.75 MB Avg. ticks: 84,768 Avg. db queries : 992.00 Margin of error : 0.5314 sec

Plugin list: =========================================== P3 (Plugin Performance Profiler) – 0.0037 sec – 0.06% Advance Wp Query Search Filter – 0.0110 sec – 0.19% Advanced Access Manager – 3.0120 sec – 51.99% All In One Seo Pack – 0.1199 sec – 2.07% Export Users to CSV – 0.0032 sec – 0.05% Google Analyticator – 0.0418 sec – 0.72% Google Sitemap Generator – 0.0005 sec – 0.01% ILC Product Slider – 0.1305 sec – 2.25% Installer – 0.0219 sec – 0.38% Members – 0.0039 sec – 0.07% Sendgrid Email Delivery Simplified – 0.0577 sec – 1.00% Smart Reporter For Wp E Commerce – 0.0007 sec – 0.01% Ubermenu.v.2.4.0.3.dlewordpress.com – 0.6670 sec – 11.51% WooCommerce Print Invoices & Delivery Notes – 0.0040 sec – 0.07% Woocommerce Facebook Share Like Button – 0.0743 sec – 1.28% Woocommerce Multilingual – 0.0171 sec – 0.29% Woocommerce Product Addons – 0.0013 sec – 0.02% WooCommerce Sequential Order Numbers – 0.0017 sec – 0.03% Woocommerce Table Rate Shipping – 0.0016 sec – 0.03% WooCommerce – 1.1870 sec – 20.49% WooDojo – 0.0078 sec – 0.14% WooSidebars – 0.0054 sec – 0.09% WordPress Popup – 0.0055 sec – 0.09% WP-UserOnline – 0.1276 sec – 2.20% Wpml Media – 0.0055 sec – 0.10% Wpml String Translation – 0.2743 sec – 4.74% Wpml Translation Management – 0.0044 sec – 0.08% Woodojo Downloads – 0.0024 sec – 0.04%

affected website: http://www.mactabty.com

https://wordpress.org/plugins/advanced-access-manager/