Stuff

interlocked::increment cost == 112 ns
interlocked::decrement cost == 82 ns
interlocked::exchange cost == 89 ns
interlocked::compare_exchange cost == 108 ns
interlocked::or cost == 113 ns
interlocked::and cost == 94 ns
interlocked::bit_test_and_set cost == 96 ns

1 reader, 0 writer, 1 upgrader...

weight      system approach        simple approach        advanced approach
    10      1559ms(n.a.)           2186ms(1.00,35)        1516ms(1.00,120)
   100      4615ms(n.a.)           5215ms(1.00,109)       2700ms(1.00,91)
  1000     16006ms(n.a.)          19475ms(1.00,94)        7210ms(1.00,123)

2 reader, 0 writer, 1 upgrader...

weight      system approach        simple approach        advanced approach
    10      4089ms(n.a.)           3729ms(1.00,115)       1504ms(1.03,100)
   100      8336ms(n.a.)           8639ms(1.00,127)       1163ms(1.12,44)
  1000     26893ms(n.a.)          34158ms(1.00,125)       7564ms(1.33,119)

8 reader, 2 writer, 2 upgrader...

weight      system approach        simple approach        advanced approach
    10     17326ms(n.a.)          20038ms(1.00,126)       9998ms(1.00,125)
   100     39631ms(n.a.)          44386ms(1.00,127)      14063ms(1.00,127)
  1000    112363ms(n.a.)         197473ms(1.00,127)      87805ms(1.00,127)