Name: 10.PoW リキャップ、その他のフォークの種類 (10. PoW Recap, Other Fork Types)
Uploaded: 2021-01-14T10:27:01.000Z
Duration: 1 h 4 min 14 s
Description: VoiceTubeの動画で発音を聞きながら英語表現を覚えよう！学べる英語：

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So this is a personal gripe that I hear a lot.

That people say that proof of work doesn't scale.

And that really bugs me because sometimes I

think I sort of know what they're talking about,

and they mean like, bitcoin doesn't scale, or like,

these block chains have poor scalability properties,

You can prove an arbitrary amount of work in 0 of 1.

So in this case, well, how big were these headers?

And with that space, you can prove actually

the entire work that happened over the entire problem set.

block chains, whole bunch of scalability problems.

There's complex systems, all sorts of scaling issues.

But proven work itself, in this pure form, scales really great.

prove all the work ever done throughout the entire problem

Does anyone have any intuition about this

how do you prove all the work from all 1,800 blocks with just

AUDIENCE: Well you know that for each block, 2 to 33,

Yeah, so the thing is how do I prove the number of blocks

I remember Andrew Miller, who's now a professor at somewhere,

Who was not, during the time, wrote about this initially

What you do is you just show the luckiest block,

and I have not yet defined luckiest block.

But in this case, it was mined by turtle.

This is the block, the previous block reference was of 0065a2

turtle 1654244 and the hash of that block is 000c49a414 blah,

So anything interesting or novel about this particular block

So we didn't count the things as having more or less work just

We just looked at the threshold, did it have enough 0 bits

But then in c and red, there's another extra byte

And another extra half a byte that's all 0s.

There's a byte and a half extra-- or almost a byte

So what you can do for a compact proof work.

So if you look at this again, there's 4 green bytes, byte

if you do out 17 something, which is what we expect,

We did 16 trillion hashes for our calculation,

And another way to look at it is we needed 33 bits

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10.PoW リキャップ、その他のフォークの種類 (10. PoW Recap, Other Fork Types)

stuff

weird

bunch

aspect