Man, yenten daily buy-sell amount is less than 10k$, if you will look closer to sell orders, you will notice that you can spend only ~2-3k$ with resonable prices, from another point of view, sell-orders are also only for ~2-3k$ if not taking in mind "just in case" orders with silly prices
There are no whales in yenten now, any "mummy's little investor" can buy all sell-orders for a price of medium gpu rig and sell them next day when he finds something more profitable
Current "dump" is just ending of new-year's pump - almost all alt coins raised x5-x10 times
Actual magic with yenten will start when it will be listen on normal exchange

Sir, where did you find this info? Cache Block diagram looks exactly like the one from sandy bridge times, everything seems to be the same as inside kaby.

BTW, cygwin fails to compile:
/usr/lib/gcc/x86_64-pc-cygwin/6.4.0/../../../../x86_64-pc-cygwin/bin/ld: cannot find -lpthreadGC2
pthreads installed, pthreadGC2.dll exists inside cygwin64\usr\x86_64-w64-mingw32\sys-root\mingw\bin, tried to copy it to cygwin64\usr\x86_64-pc-cygwin\bin - no result 
looks like tomorrow will be linux day, because previously some default ubuntu gcc compiled it ok 

even more, as i can see in 7.2 manual ( https://gcc.gnu.org/onlinedocs/gcc-7.2.0/gcc/x86-Options.html#x86-Options ), skylake looks like most prefferable march as long as coffelake seems to lack avx512 support

5820k:
with 12 threads L2 hit is 49%, L3 hit is 6%
with 6 threads L2 hit is 54%, L3 hit is 11% but, only 3 cores under load

12 threads: stalled cycles 57% (wtf???), branch hit 99% (don't know what is it), 1.2-1.3 instruction per cycle (don't think it is important as long as it is "medium" value)

tomorrow will compare with 8700k

I suppose that populating scrypt algo parameters to command line can help a lot, if yescript, like regular scrypt, can be calced with different algo presets (precache amount, link split size and so on), then coffeelake make take profit from better cache-fitting splitting.
Anyway tomorrow i'll try to recompile miner with different presets in scrypt.c
i currently use windows precompiled versions on both 5820 and 8700, tomorrow i'll try latest gcc with skylake opt flag, but i suppose that compiler won't make any changes inside asm instruction so opt flag won't help, at least a lot.
That is mostly windows problem - with 6 threads it uses only 3 physical cores and 3 ht cores - clearly seen with cputemp - after start of 6 threads, 3 cores start to generate heat (70-75C on busy ones, 45C on spare) and shows 100% load, with 12 threads all cores are hot and busy
Under ubuntu difference is within the margin of error
yep, i'll try

Basic setup is ok, synth benchmarks shows nice performance
In coffee-lake, as i can see from specs, main difference is added edram L4 cache, which is used as gpu vram (i currently use this embedded gpu, but looks like there will be no benefit from adding external video board because cpu seems to be unable to use this L4 cache for anything else then gpu, or am i wrong?), other changes are (compared to 5820k):
L1 both have 32kb per core, both are 4-way accessed
L2 both have 256kb per core, but 8700k have only 4-way access while 5820 can use 8-way - not sure if it is important for scrypt
Less L3 cache (12 vs 15Mb) and less access ways (16 vs 20) but cache frequency is faster (at least 4.2GHz without overclock, while 5820 operates at about 3Ghz)

Looks like there is some performance problem with yescript16 implementation on coffee-lake cpus
Intel i5 4440 (stock 3.3GHz) @4 threads generates ~600h/s
Intel i7 5820k (no overclock, 3.6GHz) @12 threads generates ~1200h/s in pool and up to 1400 in solo mining (6 threads generate little less) with both cpuminer-opt (3.7.6 and 3.7.7v2) under windows64 and under ubuntu64
Intel i7 8700k (stock 4.3GHz) @12 threads generates only 950h/s (both pool and solo), overclocking to 5Ghz (50x100) with cache overclock to 4.6Ghz (stock is 4.2) gives no profit, even more usually performance degrade (power limit disabled, core temperatures are ~75C so no throttling involved), 1-2-3-4-5-6 threads gives less results, overclocking bus to 130Mhz (also with ram) gives no result - maximum is about 950h/s
Even more funny - on stock frequency, switching from AVX to SSE2 gives some performance boost from 950 to 1000-1050h/s

I understand that 8700k lacks quad-channel RAM and has little bit less L3 cache (12 vs 15Mb), compared to 5820, but bottleneck is obviously something different because ram overclock gives no result (so double channel is not a problem, we should see performance boost when overclocking bus and ram) and cache is also not a problem (25% cache is gone but we gain >30% frequency bonus (when overclocked) so our smaller cache works at higher speeds together with cpu cores - we can put less but more frequent and calc it in less time - ) also, compared to 4440, if cache was a bottleneck, we have twice more (12 vs 6Mb), taking in mind much higher speed and optimized pipelane, if cache only matters, we should have 2x gain, compared to 4440

I hope for a fix