chore(tests): Bump number of nodes during perf tests

[hneiva]

Increases the number of nodes from 1k to 20k, this should improve perf variance tracking.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 78.42%. Comparing base (a8a3f4d) to head (db7981f).

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #986   +/-   ##
=======================================
  Coverage   78.42%   78.42%           
=======================================
  Files         132      132           
  Lines       12370    12370           
  Branches     1491     1491           
=======================================
  Hits         9701     9701           
  Misses       2281     2281           
  Partials      388      388           

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[codspeed-hq]

Merging this PR will degrade performance by 96.5%

⚠️ Different runtime environments detected

Some benchmarks with significant performance changes were compared across different runtime environments,
which may affect the accuracy of the results.

Open the report in CodSpeed to investigate

❌ 24 (👁 24) regressed benchmarks

Performance Changes

	Benchmark	BASE	HEAD	Efficiency
👁	test_visit_postorder[linear]	2.2 ms	43 ms	-94.87%
👁	test_taskgraph_to_json[btree]	5 ms	108.2 ms	-95.37%
👁	test_for_each_task[diamond]	49.6 ms	1,109.4 ms	-95.52%
👁	test_for_each_task[linear]	3.4 ms	68 ms	-95.06%
👁	test_for_each_task[fan]	3.9 ms	82.8 ms	-95.23%
👁	test_links_dict[btree]	3.7 ms	89.8 ms	-95.85%
👁	test_for_each_task[btree]	3.4 ms	68.1 ms	-95.06%
👁	test_transitive_closure[linear]	196.9 ms	100,687.6 ms	-99.8%
👁	test_visit_postorder[btree]	2.2 ms	43.2 ms	-94.91%
👁	test_links_dict[diamond]	132.5 ms	3,316 ms	-96%
👁	test_visit_preorder[diamond]	48.2 ms	1,081.8 ms	-95.54%
👁	test_visit_preorder[fan]	2.7 ms	55.5 ms	-95.12%
👁	test_visit_postorder[diamond]	48.4 ms	1,082.2 ms	-95.53%
👁	test_links_dict[fan]	4.5 ms	123.2 ms	-96.37%
👁	test_visit_preorder[linear]	2.2 ms	43.3 ms	-94.92%
👁	test_links_dict[linear]	3.8 ms	92.4 ms	-95.93%
👁	test_visit_postorder[fan]	2.8 ms	57.6 ms	-95.19%
👁	test_taskgraph_to_json[fan]	5.6 ms	122 ms	-95.43%
👁	test_visit_preorder[btree]	2.2 ms	43.1 ms	-94.91%
👁	test_taskgraph_to_json[linear]	5 ms	107 ms	-95.32%
...	...	...	...	...

ℹ️ Only the first 20 benchmarks are displayed. Go to the app to view all benchmarks.

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_{Comparing hneiva/perf-nodes (db7981f) with main (a8a3f4d)}