BridgeJS: Optimize string encoding for JS-to-Swift crossings #75

Job	Run time
prettier	12s
check-bridgejs-generated	2m 38s
format	33s
Test BridgeJS against Swift versions (swift:6.2, 602.0.0)	3m 23s
build-examples	20m 41s
Build and Test (ubuntu-24.04, https://download.swift.org/development/ubuntu2404/swift-DEVELOPMENT...	15m 39s
Test BridgeJS against Swift versions (swift:6.3, 603.0.0)	3m 8s
Build for native target (macos-15, Xcode_16.4)	2m 8s
Test BridgeJS against Swift versions (swift:6.1.2, 601.0.0)	2m 52s
Build and Test (ubuntu-24.04, https://download.swift.org/swift-6.3-branch/ubuntu2404/swift-6.3-DE...	13m 37s
Build and Test (ubuntu-22.04, https://download.swift.org/development/ubuntu2204/swift-DEVELOPMENT...	16m 59s
Build and Test (ubuntu-22.04, https://download.swift.org/swift-6.1-release/ubuntu2204/swift-6.1-R...	12m 21s
deploy-examples	0s
	1h 34m 11s

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