When you are using the InnoDB storage engine for your TYPO3 tables, the default setting for innodb_flush_log_at_trx_commit can lead to a massive performance loss. This can happen because TYPO writes a lot of information to the cache tables and each INSERT/DELETE/UPDATE is followed by a fsync() which flushes the dirty pages to the hard disk and this is very slow.
If you set the value for innodb_flush_log_at_trx_commit to something else than the default value (which is "1"), then fsync() is called only every second.
innodb_flush_log_at_trx_commit = 2
The downside is that the system isn't ACID compliant any more and you will loose all writes of the last second when the server crashes. A value of "2" is a little bit safer than "0" because then you will only loose the last writes if the hardware or the operating system crashes and not if only the MySQL daemon dies.
Browsers don't load all required files at once referenced inside a HTML document. Instead, they limit the number of concurrent requests for a single domain. To get around this, a common way is to make the files also available via a different domain, so the browsers will download more files in parallel. Thus, rendering the page is much faster for the user.
In both cases, you need to configure the Aimeos TYPO3 extension to create links to the product pictures with a different domain. This can be done via TypoScript like this:
plugin.tx_aimeos.settings.client.html.common.content.baseurl = https://static.example.com/uploads/tx_aimeos/
page.includeCSS.tx_aimeos = https://static.example.com/typo3conf/ext/aimeos/Resources/Public/html/css/arcavias.css
page.includeJSlibs.jquery = https://static.example.com/typo3conf/ext/aimeos/Resources/Public/html/js/jquery.min.js
page.includeJSlibs.jquery-migrate = https://static.example.com/typo3conf/ext/aimeos/Resources/Public/html/js/jquery-migrate.js
page.includeJSlibs.jquery-ui = https://static.example.com/typo3conf/ext/aimeos/Resources/Public/html/js/jquery-ui.custom.min.js
page.includeJS.tx_aimeos = https://static.example.com/typo3conf/ext/aimeos/Resources/Public/html/js/arcavias.js
page.includeCSS.tx_aimeos.external = 1
page.includeJSlibs.jquery.external = 1
page.includeJSlibs.jquery-migrate.external = 1
page.includeJSlibs.jquery-ui.external = 1
page.includeJS.tx_aimeos.external = 1