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Are GUIDs the ultimate ID?

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I noticed some people don't bother having the usual incremented number as ID but instead simply generate a GUID. The advantages include:

  • Quick and easy
  • No need to keep track of previous IDs
  • Guaranteed to be unique even across machines without knowledge of each other

Some disadvantages are:

  • Possibly performance bottleneck
  • Uses a large number of bytes

My understanding is that using a GUID is beneficial in most cases, except if optimization for time or space is an issue. Did I miss something? Or do you agree with this idea?


A couple of cons:

  • Pain in the neck if you have to delve into anything manually (debuggin etc). They are completely unreadable.
  • Horrible if you ever need to pass them in a URL
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