Initial benchmarks for intersection types + a bit of speedup #129

Job	Run time
🔍 Files Changed / Changed Files	6s
⚙️ Checks / Engine (GraalVM CE) (linux, amd64)	23m 20s
⚙️ Checks / JVM Tests (GraalVM CE) (linux, amd64)	41m 35s
⚙️ Checks / Engine (GraalVM CE) (windows, amd64)	10m 38s
⚙️ Checks / JVM Tests (GraalVM CE) (windows, amd64)	1h 20m 4s
⚙️ Checks / Standard Library Tests (GraalVM CE) (linux, amd64)	33m 49s
⚙️ Checks / Standard Library Tests (GraalVM CE) (windows, amd64)	22m 59s
⚙️ Checks / Verify License Packages (linux, amd64)	2m 56s
⚙️ Checks (Optional) / Engine (GraalVM CE) (macos, amd64)	37m 44s
⚙️ Checks (Optional) / JVM Tests (GraalVM CE) (macos, amd64)	1h 0m 25s
⚙️ Checks (Optional) / Standard Library Tests (GraalVM CE) (macos, amd64)	54m 56s
Engine Required Checks	1s
	6h 8m 33s

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