What is the URL of the site?
What do you deem as slow?
At what point is the site running slow?
What sort of traffic volumes are you getting? For instance are you reaching 10,000 concurrent users then noticing it go slow for checkout? Or are you managing 30 people on the site just
Think about the architecture of the Magento site - the problem could be at one, or multiple points, below:
- it's sat on hardware, on a network, with a provider/hosting company
- it's written with PHP code (core Magento and extensions) at the back-end
- it's written with HTML, JavaScript and CSS at the front-end
- is there any caching in place? (either code-based, or web/page load based - so Memcached, or Varnish, etc)
How many SKUs do you have on the site?
How many stores do you have on the Magento installation?
What version of Magento are you running? (Community or Enterprise and which version number?)
Who provides the hosting - what's the details of the hosting? (single VPS, multi-server dedicated setup, AWS, etc)