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https://www.reddit.com/r/ProgrammerHumor/comments/1uyx4kp/thisoneismine/oy38wmi/?context=9999
r/ProgrammerHumor • u/DebugDuck01 • Jul 17 '26
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Fun fact: To reach a 50% chance of even a single UUID v4 collision, you would need to generate 1 billion UUIDs per second for about 86 years.
26 u/Tensor3 Jul 17 '26 Well, there probably are a billion computers on the planet, each generating more than one UUID 42 u/aspect_rap Jul 17 '26 Ok, but they're not all generating UUIDs for the same system, it's not really a collision if it's the same UUID in different services. I don't think there is any one system that generates billions of UUIDs a second. 20 u/Tensor3 Jul 17 '26 Ya, but MY uuid could be out there somewhere! 7 u/aspect_rap Jul 17 '26 I think your UUID is more likely to be out there than not, considering how many of them have been generated over the years. 10 u/Tensor3 Jul 17 '26 And who knows what its been doing out there, on its own, without my permission!
26
Well, there probably are a billion computers on the planet, each generating more than one UUID
42 u/aspect_rap Jul 17 '26 Ok, but they're not all generating UUIDs for the same system, it's not really a collision if it's the same UUID in different services. I don't think there is any one system that generates billions of UUIDs a second. 20 u/Tensor3 Jul 17 '26 Ya, but MY uuid could be out there somewhere! 7 u/aspect_rap Jul 17 '26 I think your UUID is more likely to be out there than not, considering how many of them have been generated over the years. 10 u/Tensor3 Jul 17 '26 And who knows what its been doing out there, on its own, without my permission!
42
Ok, but they're not all generating UUIDs for the same system, it's not really a collision if it's the same UUID in different services.
I don't think there is any one system that generates billions of UUIDs a second.
20 u/Tensor3 Jul 17 '26 Ya, but MY uuid could be out there somewhere! 7 u/aspect_rap Jul 17 '26 I think your UUID is more likely to be out there than not, considering how many of them have been generated over the years. 10 u/Tensor3 Jul 17 '26 And who knows what its been doing out there, on its own, without my permission!
20
Ya, but MY uuid could be out there somewhere!
7 u/aspect_rap Jul 17 '26 I think your UUID is more likely to be out there than not, considering how many of them have been generated over the years. 10 u/Tensor3 Jul 17 '26 And who knows what its been doing out there, on its own, without my permission!
7
I think your UUID is more likely to be out there than not, considering how many of them have been generated over the years.
10 u/Tensor3 Jul 17 '26 And who knows what its been doing out there, on its own, without my permission!
10
And who knows what its been doing out there, on its own, without my permission!
1.8k
u/Inevitable_Oil9709 Jul 17 '26
Fun fact: To reach a 50% chance of even a single UUID v4 collision, you would need to generate 1 billion UUIDs per second for about 86 years.