Can Too Many Network Requests Cause Issue For Google Search & SEO
Briefly

Martin Splitt emphasized that while the number of network requests might be a minimal concern, it should not be a major worry when it comes to rendering and indexing.
He specifically noted, 'I don't think you need to work much about cost of rendering, CPU usage, and server stuff, but maybe, just maybe, network requests are something to consider, albeit lightly.'
Splitt pointed out that even with network requests, 'I wouldn't worry about it too much,' implying that other aspects of rendering and indexing are far more critical to SEO.
Read at Search Engine Roundtable
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