Initial benchmarks for intersection types + a bit of speedup #433

Job	Run time
🔍 Files Changed / Changed Files	5s
⚙️ Checks (Optional) / Engine (GraalVM CE) (macos, amd64)	37m 35s
⚙️ Checks (Optional) / Standard Library Tests (GraalVM CE) (macos, amd64)	40m 42s
⚙️ Checks (Optional) / JVM Tests (GraalVM CE) (macos, amd64)	1h 30m 6s
⚙️ Checks / Engine (GraalVM CE) (windows, amd64)	24m 44s
⚙️ Checks / Engine (GraalVM CE) (linux, amd64)	33m 1s
⚙️ Checks / JVM Tests (GraalVM CE) (linux, amd64)	29m 33s
⚙️ Checks / JVM Tests (GraalVM CE) (windows, amd64)	1h 26m 26s
⚙️ Checks / Standard Library Tests (GraalVM CE) (linux, amd64)	38m 26s
⚙️ Checks / Standard Library Tests (GraalVM CE) (windows, amd64)	25m 58s
⚙️ Checks / Verify License Packages (linux, amd64)	7m 0s
Engine Required Checks	1s
	6h 53m 37s

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