Testing Go's github.com/valyala/fastrand with PractRand (using https://github.com/flyingmutant/rand/tree/master/misc/practrand)

practrand-fastrand-Uint64.txt

> ./practrand -gen=x-fast | PractRand stdin64 -multithreaded
RNG_test using PractRand version 0.95
RNG = RNG_stdin64, seed = unknown
test set = core, folding = standard (64 bit)

rng=RNG_stdin64, seed=unknown
length= 1 gigabyte (2^30 bytes), time= 3.7 seconds
  Test Name                         Raw       Processed     Evaluation
  BCFN(2+0,13-1,T)                  R=+217.8  p =  9.2e-117   FAIL !!!!!     
  BCFN(2+1,13-1,T)                  R= +47.8  p =  3.4e-25    FAIL !!        
  BCFN(2+2,13-1,T)                  R= +12.8  p =  2.5e-6   suspicious       
  DC6-9x1Bytes-1                    R= +1878  p =  9.0e-972   FAIL !!!!!!!   
  Gap-16:A                          R=  +9.0  p =  2.6e-7   very suspicious  
  Gap-16:B                          R=  +7.1  p =  5.1e-6   suspicious       
  FPF-14+6/16:(0,14-0)              R=  -6.6  p =1-9.4e-6   unusual          
  FPF-14+6/16:(1,14-0)              R=  -8.7  p =1-1.1e-7   suspicious       
  FPF-14+6/16:(3,14-0)              R=  -6.5  p =1-1.0e-5   unusual          
  FPF-14+6/16:all                   R= -15.2  p =1-1.7e-14    FAIL           
  BRank(12):128(8)                  R= +5547  p~=  5e-3561    FAIL !!!!!!!!  
  BRank(12):256(4)                  R= +9433  p~=  7e-5018    FAIL !!!!!!!!  
  BRank(12):384(1)                  R= +7472  p~=  2e-2250    FAIL !!!!!!!!  
  BRank(12):512(4)                  R=+20455  p~= 0           FAIL !!!!!!!!  
  BRank(12):768(1)                  R=+15738  p~=  8e-4739    FAIL !!!!!!!!  
  BRank(12):1K(2)                   R=+30051  p~=  2e-9047    FAIL !!!!!!!!  
  BRank(12):1536(1)                 R=+32271  p~=  1e-9715    FAIL !!!!!!!!  
  BRank(12):2K(2)                   R=+61226  p~= 0           FAIL !!!!!!!!  
  BRank(12):3K(1)                   R=+65337  p~= 0           FAIL !!!!!!!!  
  [Low16/64]DC6-9x1Bytes-1          R= +29.5  p =  1.8e-15    FAIL !         
  [Low16/64]Gap-16:A                R= +45.0  p =  1.5e-35    FAIL !!!       
  [Low16/64]Gap-16:B                R= +27.7  p =  1.4e-22    FAIL !!        
  [Low16/64]FPF-14+6/16:all         R=  -8.0  p =1-2.1e-7   very suspicious  
  [Low16/64]BRank(12):128(4)        R= +3922  p~=  8e-2087    FAIL !!!!!!!!  
  [Low16/64]BRank(12):256(4)        R= +9433  p~=  7e-5018    FAIL !!!!!!!!  
  [Low16/64]BRank(12):384(1)        R= +7472  p~=  2e-2250    FAIL !!!!!!!!  
  [Low16/64]BRank(12):512(2)        R=+14464  p~=  4e-4355    FAIL !!!!!!!!  
  [Low16/64]BRank(12):768(1)        R=+15738  p~=  8e-4739    FAIL !!!!!!!!  
  [Low16/64]BRank(12):1K(2)         R=+30051  p~=  2e-9047    FAIL !!!!!!!!  
  [Low16/64]BRank(12):1536(1)       R=+32271  p~=  1e-9715    FAIL !!!!!!!!  
  [Low16/64]BRank(12):2K(1)         R=+43293  p~= 0           FAIL !!!!!!!!  
  [Low4/64]BRank(12):128(4)         R= +3922  p~=  8e-2087    FAIL !!!!!!!!  
  [Low4/64]BRank(12):256(2)         R= +6670  p~=  5e-2009    FAIL !!!!!!!!  
  [Low4/64]BRank(12):384(1)         R= +7472  p~=  2e-2250    FAIL !!!!!!!!  
  [Low4/64]BRank(12):512(2)         R=+14464  p~=  4e-4355    FAIL !!!!!!!!  
  [Low4/64]BRank(12):768(1)         R=+15738  p~=  8e-4739    FAIL !!!!!!!!  
  [Low4/64]BRank(12):1K(1)          R=+21249  p~=  9e-6398    FAIL !!!!!!!!  
  [Low1/64]Gap-16:A                 R= +27.0  p =  6.6e-21    FAIL !!        
  [Low1/64]Gap-16:B                 R=  +5.9  p =  4.7e-5   mildly suspicious
  [Low1/64]BRank(12):128(4)         R= +3922  p~=  8e-2087    FAIL !!!!!!!!  
  [Low1/64]BRank(12):256(2)         R= +6670  p~=  5e-2009    FAIL !!!!!!!!  
  [Low1/64]BRank(12):384(1)         R= +7472  p~=  2e-2250    FAIL !!!!!!!!  
  [Low1/64]BRank(12):512(2)         R=+14464  p~=  4e-4355    FAIL !!!!!!!!  
  [Low1/64]BRank(12):768(1)         R=+15738  p~=  8e-4739    FAIL !!!!!!!!  
  ...and 202 test result(s) without anomalies