Your earlier article suggests you aren't using a CDN. Might be well worth looking into - not for any bot detection so much as just having a good old fashioned cache in front of you.
Caches only help for pages that have been requested recently. The behavior of crawlers - going from one page to the next across the whole site - will probably not be mitigated significantly by a cache.
Caches only help for pages that have been requested recently. The behavior of crawlers - going from one page to the next across the whole site - will probably not be mitigated significantly by a cache.