• Alexei Filippov's avatar
    Warm up RNG when --random_seed is used · 88c5da04
    Alexei Filippov authored
    The RNG state is initialized with random_seed parameter that usually
    has lots of zeros. Each random generation iteration shuffles bits with
    xor operation over the state. It takes a while before the state is populated
    with enough 1s and starts generating uniformly distributed numbers.
    
    The patch warms up the state with 32 iterations when --random_seed is used.
    
    BUG=v8:8265
    
    Change-Id: I7a4e8c842962bea0f2935c7b3673494367d8580f
    Reviewed-on: https://chromium-review.googlesource.com/c/1263816
    Commit-Queue: Alexei Filippov <alph@chromium.org>
    Reviewed-by: 's avatarYang Guo <yangguo@chromium.org>
    Cr-Commit-Position: refs/heads/master@{#56418}
    88c5da04
math-random.cc 2.49 KB