Transactions completed for each 100 second run:

       Unmodified RHEL7 MariaDB          MariaDB with Joe's changes.
       ------------------------          ---------------------------
Number of threads: 12
       573236 (5732.25 per sec.)         576652 (5766.42 per sec.):  0.6 % 
       575003 (5749.93 per sec.)         576597 (5765.90 per sec.):  0.3 % 
       574133 (5741.23 per sec.)         578856 (5788.46 per sec.):  0.8 % 
Number of threads: 20
       303318 (3033.06 per sec.)         358691 (3586.78 per sec.):  18.3 % 
       308953 (3089.42 per sec.)         358758 (3587.43 per sec.):  16.1 % 
       309634 (3096.23 per sec.)         370566 (3705.52 per sec.):  19.7 % 
Number of threads: 30
       309345 (3093.27 per sec.)         336787 (3367.70 per sec.):  8.9 % 
       309519 (3094.99 per sec.)         335216 (3352.02 per sec.):  8.3 % 
Number of threads: 40
       324260 (3242.34 per sec.)         343905 (3438.82 per sec.):  6.1 % 
       327952 (3279.25 per sec.)         337273 (3372.48 per sec.):  2.8 % 
Number of threads: 50
       337288 (3372.58 per sec.)         353489 (3534.50 per sec.):  4.8 % 
       332072 (3320.40 per sec.)         354876 (3548.45 per sec.):  6.9 % 
Number of threads: 60
       333915 (3338.76 per sec.)         348962 (3489.22 per sec.):  4.5 % 
       337160 (3371.16 per sec.)         343768 (3437.23 per sec.):  2.0 % 
Number of threads: 12
       574500 (5744.89 per sec.)         576654 (5766.44 per sec.):  0.4 % 
       575281 (5752.71 per sec.)         578526 (5785.16 per sec.):  0.6 % 
       574441 (5744.31 per sec.)         577068 (5770.58 per sec.):  0.5 % 
Number of threads: 20
       338170 (3381.59 per sec.)         362993 (3629.79 per sec.):  7.3 % 
       336329 (3363.19 per sec.)         375755 (3757.40 per sec.):  11.7 % 
       330703 (3306.87 per sec.)         386578 (3865.68 per sec.):  16.9 % 
Number of threads: 30
       310004 (3099.88 per sec.)         338357 (3383.40 per sec.):  9.1 % 
       309671 (3096.56 per sec.)         327242 (3272.27 per sec.):  5.7 % 
Number of threads: 40
       324194 (3241.70 per sec.)         339726 (3396.99 per sec.):  4.8 % 
       323398 (3233.71 per sec.)         341410 (3413.86 per sec.):  5.6 % 
Number of threads: 50
       332071 (3320.39 per sec.)         352010 (3519.78 per sec.):  6.0 % 
       334998 (3349.67 per sec.)         355481 (3554.51 per sec.):  6.1 % 
Number of threads: 60
       331540 (3315.02 per sec.)         354008 (3539.65 per sec.):  6.8 % 
       328172 (3281.34 per sec.)         349419 (3493.87 per sec.):  6.5 % 
Number of threads: 12
       575499 (5754.89 per sec.)         579309 (5793.00 per sec.):  0.7 % 
       577886 (5778.75 per sec.)         574678 (5746.68 per sec.):  -0.6 % 
       580000 (5799.89 per sec.)         579103 (5790.93 per sec.):  -0.2 % 
Number of threads: 20
       340721 (3407.10 per sec.)         391275 (3912.59 per sec.):  14.8 % 
       342961 (3429.49 per sec.)         386083 (3860.68 per sec.):  12.6 % 
       329900 (3298.86 per sec.)         365926 (3659.16 per sec.):  10.9 % 
Number of threads: 30
       310093 (3100.72 per sec.)         344172 (3441.56 per sec.):  11.0 % 
       309849 (3098.30 per sec.)         334643 (3346.26 per sec.):  8.0 % 
Number of threads: 40
       312101 (3120.76 per sec.)         347021 (3469.99 per sec.):  11.2 % 
       312454 (3124.30 per sec.)         347233 (3472.10 per sec.):  11.1 % 
Number of threads: 50
       326421 (3263.92 per sec.)         355943 (3558.95 per sec.):  9.0 % 
       323589 (3235.55 per sec.)         354472 (3544.41 per sec.):  9.5 % 
Number of threads: 60
       337212 (3371.71 per sec.)         354844 (3548.04 per sec.):  5.2 % 
       329585 (3295.47 per sec.)         360375 (3603.37 per sec.):  9.3 %