lib: refactor debuglog init

[aduh95]

Alternative to #38756.

[aduh95]

Benchmark CI (misc/startup): https://ci.nodejs.org/view/Node.js%20benchmark/job/benchmark-node-micro-benchmarks/1033/
Benchmark CI (streams+events): https://ci.nodejs.org/view/Node.js%20benchmark/job/benchmark-node-micro-benchmarks/1034/

Results

                                                                                  confidence improvement accuracy (*)   (**)  (***)
misc/startup.js mode='process' script='benchmark/fixtures/require-builtins' dur=1                -0.57 %       ±1.70% ±2.26% ±2.94%
misc/startup.js mode='process' script='benchmark/fixtures/require-cachable' dur=1                 0.11 %       ±1.66% ±2.20% ±2.87%
misc/startup.js mode='process' script='test/fixtures/semicolon' dur=1                             0.31 %       ±0.97% ±1.30% ±1.69%
misc/startup.js mode='worker' script='benchmark/fixtures/require-builtins' dur=1                 -0.13 %       ±2.18% ±2.90% ±3.78%
misc/startup.js mode='worker' script='benchmark/fixtures/require-cachable' dur=1          **      3.04 %       ±1.97% ±2.62% ±3.42%
misc/startup.js mode='worker' script='test/fixtures/semicolon' dur=1                             -1.01 %       ±1.41% ±1.89% ±2.47%
                                                                                          confidence improvement accuracy (*)    (**)   (***)
events/ee-add-remove.js n=1000000 removeListener=0 newListener=0                                          1.40 %       ±4.75%  ±6.32%  ±8.24%
events/ee-add-remove.js n=1000000 removeListener=0 newListener=1                                         -0.77 %       ±3.29%  ±4.38%  ±5.70%
events/ee-add-remove.js n=1000000 removeListener=1 newListener=0                                         -1.87 %       ±4.08%  ±5.48%  ±7.24%
events/ee-add-remove.js n=1000000 removeListener=1 newListener=1                                         -0.70 %       ±3.61%  ±4.80%  ±6.25%
events/ee-emit.js listeners=10 argc=0 n=2000000                                                          -1.35 %       ±2.32%  ±3.11%  ±4.10%
events/ee-emit.js listeners=10 argc=10 n=2000000                                                         -0.46 %       ±1.03%  ±1.37%  ±1.79%
events/ee-emit.js listeners=10 argc=2 n=2000000                                                          -0.45 %       ±0.90%  ±1.20%  ±1.56%
events/ee-emit.js listeners=10 argc=4 n=2000000                                                           0.15 %       ±1.17%  ±1.56%  ±2.05%
events/ee-emit.js listeners=1 argc=0 n=2000000                                                            3.06 %       ±4.71%  ±6.27%  ±8.16%
events/ee-emit.js listeners=1 argc=10 n=2000000                                                          -1.68 %       ±4.12%  ±5.48%  ±7.13%
events/ee-emit.js listeners=1 argc=2 n=2000000                                                           -0.39 %       ±3.74%  ±4.98%  ±6.48%
events/ee-emit.js listeners=1 argc=4 n=2000000                                                           -1.30 %       ±4.12%  ±5.49%  ±7.15%
events/ee-emit.js listeners=5 argc=0 n=2000000                                                            1.13 %       ±2.36%  ±3.15%  ±4.10%
events/ee-emit.js listeners=5 argc=10 n=2000000                                                           0.55 %       ±1.88%  ±2.51%  ±3.28%
events/ee-emit.js listeners=5 argc=2 n=2000000                                                            0.33 %       ±2.32%  ±3.08%  ±4.02%
events/ee-emit.js listeners=5 argc=4 n=2000000                                                           -0.64 %       ±2.19%  ±2.92%  ±3.80%
events/ee-listener-count-on-prototype.js n=50000000                                                       0.13 %       ±2.05%  ±2.74%  ±3.57%
events/ee-listeners.js raw='false' listeners=50 n=5000000                                                -0.05 %       ±2.38%  ±3.18%  ±4.17%
events/ee-listeners.js raw='false' listeners=5 n=5000000                                                  0.32 %       ±1.94%  ±2.58%  ±3.36%
events/ee-listeners.js raw='true' listeners=50 n=5000000                                                 -1.22 %       ±1.32%  ±1.76%  ±2.30%
events/ee-listeners.js raw='true' listeners=5 n=5000000                                                  -1.59 %       ±5.51%  ±7.37%  ±9.67%
events/ee-once.js argc=0 n=20000000                                                                      -0.52 %       ±0.84%  ±1.12%  ±1.46%
events/ee-once.js argc=1 n=20000000                                                                       0.46 %       ±1.33%  ±1.77%  ±2.30%
events/ee-once.js argc=4 n=20000000                                                                      -1.96 %       ±3.15%  ±4.20%  ±5.49%
events/ee-once.js argc=5 n=20000000                                                               **     -2.06 %       ±1.42%  ±1.89%  ±2.47%
events/eventtarget.js listeners=10 n=1000000                                                              2.18 %       ±3.41%  ±4.56%  ±5.99%
events/eventtarget.js listeners=1 n=1000000                                                               3.68 %       ±4.56%  ±6.12%  ±8.05%
events/eventtarget.js listeners=5 n=1000000                                                               0.53 %       ±5.67%  ±7.55%  ±9.82%
streams/creation.js kind='duplex' n=50000000                                                       *      1.89 %       ±1.53%  ±2.03%  ±2.65%
streams/creation.js kind='readable' n=50000000                                                           -0.73 %       ±1.44%  ±1.91%  ±2.49%
streams/creation.js kind='transform' n=50000000                                                          -0.17 %       ±1.94%  ±2.58%  ±3.37%
streams/creation.js kind='writable' n=50000000                                                            0.56 %       ±1.09%  ±1.45%  ±1.89%
streams/pipe.js n=5000000                                                                                 0.48 %       ±4.31%  ±5.74%  ±7.47%
streams/pipe-object-mode.js n=5000000                                                                    -0.02 %       ±2.25%  ±2.99%  ±3.90%
streams/readable-async-iterator.js sync='no' n=100000                                                     0.61 %       ±2.31%  ±3.08%  ±4.01%
streams/readable-async-iterator.js sync='yes' n=100000                                                   -0.34 %       ±4.17%  ±5.55%  ±7.23%
streams/readable-bigread.js n=1000                                                                       -5.49 %       ±5.67%  ±7.55%  ±9.82%
streams/readable-bigunevenread.js n=1000                                                                  2.46 %       ±3.89%  ±5.17%  ±6.74%
streams/readable-boundaryread.js type='buffer' n=2000                                                     0.70 %       ±1.82%  ±2.42%  ±3.15%
streams/readable-boundaryread.js type='string' n=2000                                                     0.02 %       ±3.94%  ±5.24%  ±6.83%
streams/readable-from.js n=10000000                                                                       1.76 %       ±4.03%  ±5.37%  ±6.99%
streams/readable-readall.js n=5000                                                                        3.71 %       ±9.67% ±12.87% ±16.75%
streams/readable-unevenread.js n=1000                                                                     1.19 %       ±3.60%  ±4.79%  ±6.24%
streams/writable-manywrites.js len=1024 callback='no' writev='no' sync='no' n=2000000                     1.92 %       ±4.02%  ±5.41%  ±7.17%
streams/writable-manywrites.js len=1024 callback='no' writev='no' sync='yes' n=2000000                   -1.71 %       ±5.94%  ±7.93% ±10.38%
streams/writable-manywrites.js len=1024 callback='no' writev='yes' sync='no' n=2000000                   -0.14 %       ±2.53%  ±3.36%  ±4.38%
streams/writable-manywrites.js len=1024 callback='no' writev='yes' sync='yes' n=2000000                   0.97 %       ±3.03%  ±4.03%  ±5.24%
streams/writable-manywrites.js len=1024 callback='yes' writev='no' sync='no' n=2000000                   -0.46 %       ±1.23%  ±1.63%  ±2.13%
streams/writable-manywrites.js len=1024 callback='yes' writev='no' sync='yes' n=2000000                  -0.44 %       ±3.65%  ±4.86%  ±6.32%
streams/writable-manywrites.js len=1024 callback='yes' writev='yes' sync='no' n=2000000                   0.10 %       ±2.10%  ±2.80%  ±3.65%
streams/writable-manywrites.js len=1024 callback='yes' writev='yes' sync='yes' n=2000000                 -2.27 %       ±3.89%  ±5.18%  ±6.74%
streams/writable-manywrites.js len=32768 callback='no' writev='no' sync='no' n=2000000                   -0.44 %       ±2.08%  ±2.77%  ±3.62%
streams/writable-manywrites.js len=32768 callback='no' writev='no' sync='yes' n=2000000                  -0.88 %       ±1.26%  ±1.68%  ±2.18%
streams/writable-manywrites.js len=32768 callback='no' writev='yes' sync='no' n=2000000                   0.91 %       ±2.87%  ±3.83%  ±5.03%
streams/writable-manywrites.js len=32768 callback='no' writev='yes' sync='yes' n=2000000                 -1.70 %       ±3.51%  ±4.71%  ±6.20%
streams/writable-manywrites.js len=32768 callback='yes' writev='no' sync='no' n=2000000            *     -1.71 %       ±1.41%  ±1.88%  ±2.45%
streams/writable-manywrites.js len=32768 callback='yes' writev='no' sync='yes' n=2000000                 -0.41 %       ±1.11%  ±1.48%  ±1.93%
streams/writable-manywrites.js len=32768 callback='yes' writev='yes' sync='no' n=2000000                  0.70 %       ±1.77%  ±2.36%  ±3.09%
streams/writable-manywrites.js len=32768 callback='yes' writev='yes' sync='yes' n=2000000                -1.10 %       ±3.89%  ±5.22%  ±6.89%

[nodejs-github-bot]

CI: https://ci.nodejs.org/job/node-test-pull-request/38373/

[nodejs-github-bot]

CI: https://ci.nodejs.org/job/node-test-pull-request/38379/

[nodejs-github-bot]

CI: https://ci.nodejs.org/job/node-test-pull-request/38545/

[RaisinTen]

LGTM.
Would it also make sense to correct this comment nearby, by replacing debugs with debugImpls (it was supposed to be done in #33424)?

node/lib/internal/util/debuglog.js

Lines 15 to 17 in 102f98e

	// `debugs` is deliberately initialized to undefined so any call to
	// debuglog() before initializeDebugEnv() is called will throw.
	let debugImpls;

[nodejs-github-bot]

CI: https://ci.nodejs.org/job/node-test-pull-request/38548/
CI: https://ci.nodejs.org/job/node-test-commit/47161/

[aduh95]

Landed in 423ae41