events: refactor to be less susceptible to prototype pollution

[aduh95]

No description provided.

[aduh95]

Benchmark CI: https://ci.nodejs.org/view/Node.js%20benchmark/job/benchmark-node-micro-benchmarks/1337/

                                                                 confidence improvement accuracy (*)    (**)   (***)
events/ee-add-remove.js n=1000000 removeListener=0 newListener=0                 0.44 %       ±1.44%  ±1.91%  ±2.49%
events/ee-add-remove.js n=1000000 removeListener=0 newListener=1                 0.96 %       ±1.02%  ±1.36%  ±1.77%
events/ee-add-remove.js n=1000000 removeListener=1 newListener=0         **      1.93 %       ±1.18%  ±1.57%  ±2.05%
events/ee-add-remove.js n=1000000 removeListener=1 newListener=1                -0.18 %       ±1.04%  ±1.39%  ±1.81%
events/ee-emit.js listeners=1 argc=0 n=2000000                          ***    -20.40 %       ±6.23%  ±8.28% ±10.78%
events/ee-emit.js listeners=1 argc=10 n=2000000                         ***    -24.61 %       ±4.16%  ±5.56%  ±7.29%
events/ee-emit.js listeners=1 argc=2 n=2000000                          ***    -17.64 %       ±8.22% ±10.95% ±14.28%
events/ee-emit.js listeners=1 argc=4 n=2000000                          ***    -22.84 %       ±3.27%  ±4.36%  ±5.67%
events/ee-emit.js listeners=10 argc=0 n=2000000                                  0.70 %       ±6.51%  ±8.67% ±11.29%
events/ee-emit.js listeners=10 argc=10 n=2000000                          *      3.58 %       ±3.53%  ±4.69%  ±6.11%
events/ee-emit.js listeners=10 argc=2 n=2000000                           *      6.03 %       ±4.75%  ±6.32%  ±8.23%
events/ee-emit.js listeners=10 argc=4 n=2000000                          **      6.76 %       ±4.07%  ±5.43%  ±7.11%
events/ee-emit.js listeners=5 argc=0 n=2000000                                  -0.05 %       ±6.39%  ±8.51% ±11.11%
events/ee-emit.js listeners=5 argc=10 n=2000000                                  4.64 %       ±5.18%  ±6.89%  ±8.98%
events/ee-emit.js listeners=5 argc=2 n=2000000                                   1.57 %       ±7.99% ±10.63% ±13.83%
events/ee-emit.js listeners=5 argc=4 n=2000000                                   5.65 %       ±7.09%  ±9.44% ±12.29%
events/ee-listen-unique.js n=1000000 events=1                                   -0.55 %       ±1.26%  ±1.68%  ±2.19%
events/ee-listen-unique.js n=1000000 events=10                                   0.46 %       ±2.35%  ±3.12%  ±4.06%
events/ee-listen-unique.js n=1000000 events=2                                    0.24 %       ±1.07%  ±1.43%  ±1.86%
events/ee-listen-unique.js n=1000000 events=20                                   0.04 %       ±1.63%  ±2.17%  ±2.82%
events/ee-listen-unique.js n=1000000 events=3                                   -0.15 %       ±1.10%  ±1.46%  ±1.90%
events/ee-listen-unique.js n=1000000 events=5                                    0.20 %       ±0.97%  ±1.29%  ±1.68%
events/ee-listener-count-on-prototype.js n=50000000                              0.61 %       ±3.23%  ±4.29%  ±5.59%
events/ee-listeners.js raw='false' listeners=5 n=5000000                  *      7.18 %       ±6.90%  ±9.18% ±11.95%
events/ee-listeners.js raw='false' listeners=50 n=5000000                       -0.37 %       ±1.35%  ±1.80%  ±2.34%
events/ee-listeners.js raw='true' listeners=5 n=5000000                         -2.57 %       ±9.62% ±12.80% ±16.66%
events/ee-listeners.js raw='true' listeners=50 n=5000000                        -0.80 %       ±3.95%  ±5.26%  ±6.85%
events/ee-once.js argc=0 n=20000000                                     ***     -7.20 %       ±0.60%  ±0.80%  ±1.04%
events/ee-once.js argc=1 n=20000000                                     ***     -7.95 %       ±0.41%  ±0.55%  ±0.72%
events/ee-once.js argc=4 n=20000000                                     ***     -7.56 %       ±0.52%  ±0.69%  ±0.90%
events/ee-once.js argc=5 n=20000000                                     ***     -7.29 %       ±0.47%  ±0.62%  ±0.81%
events/eventtarget-add-remove.js nListener=10 n=1000000                         -0.01 %       ±0.36%  ±0.48%  ±0.62%
events/eventtarget-add-remove.js nListener=5 n=1000000                          -0.14 %       ±0.55%  ±0.74%  ±0.96%
events/eventtarget-creation.js n=1000000                                        -6.11 %       ±9.76% ±12.99% ±16.90%
events/eventtarget.js listeners=1 n=1000000                                      1.06 %      ±10.05% ±13.38% ±17.42%
events/eventtarget.js listeners=10 n=1000000                                    -1.08 %       ±4.22%  ±5.62%  ±7.32%
events/eventtarget.js listeners=5 n=1000000                                      0.68 %       ±5.70%  ±7.59%  ±9.88%

[RaisinTen]

There are some regressions :/

[aduh95]

Benchmark CI: https://ci.nodejs.org/view/Node.js%20benchmark/job/benchmark-node-micro-benchmarks/1338/

Results

                                                                 confidence improvement accuracy (*)    (**)   (***)
events/ee-add-remove.js n=1000000 removeListener=0 newListener=0                 0.23 %       ±1.06%  ±1.42%  ±1.84%
events/ee-add-remove.js n=1000000 removeListener=0 newListener=1                 0.76 %       ±1.21%  ±1.61%  ±2.09%
events/ee-add-remove.js n=1000000 removeListener=1 newListener=0        ***      2.30 %       ±1.23%  ±1.64%  ±2.13%
events/ee-add-remove.js n=1000000 removeListener=1 newListener=1                -0.49 %       ±1.28%  ±1.70%  ±2.22%
events/ee-emit.js listeners=1 argc=0 n=2000000                          ***    -23.37 %       ±7.66% ±10.21% ±13.32%
events/ee-emit.js listeners=1 argc=10 n=2000000                         ***    -24.98 %       ±6.21%  ±8.27% ±10.79%
events/ee-emit.js listeners=1 argc=2 n=2000000                          ***    -20.11 %       ±8.02% ±10.68% ±13.92%
events/ee-emit.js listeners=1 argc=4 n=2000000                          ***    -23.31 %       ±4.30%  ±5.72%  ±7.44%
events/ee-emit.js listeners=10 argc=0 n=2000000                                 -1.40 %       ±6.41%  ±8.52% ±11.10%
events/ee-emit.js listeners=10 argc=10 n=2000000                                 0.19 %       ±3.71%  ±4.94%  ±6.44%
events/ee-emit.js listeners=10 argc=2 n=2000000                          **      6.76 %       ±4.53%  ±6.02%  ±7.84%
events/ee-emit.js listeners=10 argc=4 n=2000000                                  2.38 %       ±2.73%  ±3.63%  ±4.72%
events/ee-emit.js listeners=5 argc=0 n=2000000                                  -2.01 %       ±6.98%  ±9.31% ±12.16%
events/ee-emit.js listeners=5 argc=10 n=2000000                                  2.00 %       ±6.06%  ±8.07% ±10.51%
events/ee-emit.js listeners=5 argc=2 n=2000000                                  -2.42 %       ±6.99%  ±9.30% ±12.10%
events/ee-emit.js listeners=5 argc=4 n=2000000                                   6.47 %       ±6.62%  ±8.82% ±11.49%
events/ee-listen-unique.js n=1000000 events=1                                   -0.27 %       ±1.69%  ±2.25%  ±2.94%
events/ee-listen-unique.js n=1000000 events=10                                  -1.23 %       ±2.48%  ±3.30%  ±4.30%
events/ee-listen-unique.js n=1000000 events=2                                   -0.79 %       ±1.12%  ±1.48%  ±1.93%
events/ee-listen-unique.js n=1000000 events=20                           **      2.27 %       ±1.51%  ±2.01%  ±2.62%
events/ee-listen-unique.js n=1000000 events=3                                   -0.93 %       ±1.05%  ±1.39%  ±1.81%
events/ee-listen-unique.js n=1000000 events=5                                    0.04 %       ±1.10%  ±1.47%  ±1.92%
events/ee-listener-count-on-prototype.js n=50000000                             -1.91 %       ±3.41%  ±4.54%  ±5.91%
events/ee-listeners.js raw='false' listeners=5 n=5000000                         1.54 %       ±6.37%  ±8.47% ±11.03%
events/ee-listeners.js raw='false' listeners=50 n=5000000                        0.05 %       ±1.63%  ±2.16%  ±2.82%
events/ee-listeners.js raw='true' listeners=5 n=5000000                          5.97 %       ±9.69% ±12.91% ±16.82%
events/ee-listeners.js raw='true' listeners=50 n=5000000                        -1.15 %       ±3.58%  ±4.76%  ±6.20%
events/ee-once.js argc=0 n=20000000                                     ***     -1.52 %       ±0.68%  ±0.90%  ±1.17%
events/ee-once.js argc=1 n=20000000                                      **     -1.10 %       ±0.64%  ±0.85%  ±1.12%
events/ee-once.js argc=4 n=20000000                                     ***     -1.38 %       ±0.65%  ±0.86%  ±1.12%
events/ee-once.js argc=5 n=20000000                                             -0.36 %       ±0.83%  ±1.10%  ±1.43%
events/eventtarget-add-remove.js nListener=10 n=1000000                          0.09 %       ±0.31%  ±0.42%  ±0.54%
events/eventtarget-add-remove.js nListener=5 n=1000000                          -0.11 %       ±0.74%  ±0.98%  ±1.28%
events/eventtarget-creation.js n=1000000                                         2.28 %      ±10.75% ±14.30% ±18.62%
events/eventtarget.js listeners=1 n=1000000                                     -6.11 %       ±9.87% ±13.14% ±17.11%
events/eventtarget.js listeners=10 n=1000000                                    -0.16 %       ±4.11%  ±5.47%  ±7.11%
events/eventtarget.js listeners=5 n=1000000                                     -2.30 %       ±5.40%  ±7.18%  ±9.35%

Be aware that when doing many comparisons the risk of a false-positive
result increases. In this case, there are 37 comparisons, you can thus
expect the following amount of false-positive results:
  1.85 false positives, when considering a   5% risk acceptance (*, **, ***),
  0.37 false positives, when considering a   1% risk acceptance (**, ***),
  0.04 false positives, when considering a 0.1% risk acceptance (***)