Add feature inventory

[turbolent]

Description

Add a non-exhaustive, non-authoritative inventory of Cadence language features, automatically generated from the codebase. This is internal documentation only.

The hope is that it can help us with finding gaps in e.g. documentation, compiler/VM implementation, future spec, etc.

---

• Targeted PR against master branch
• Linked to Github issue with discussion and accepted design OR link to spec that describes this work
• Code follows the standards mentioned here
• Updated relevant documentation
• Re-reviewed Files changed in the Github PR explorer
• Added appropriate labels

[github-actions]

Dependency Review

✅ No vulnerabilities or license issues or OpenSSF Scorecard issues found.

Scanned Files

None

[github-actions]

Benchstat comparison

• Base branch: onflow:master
• Base commit: 73b315f

Results

	old.txt	new.txt
	time/op		delta
pkg:github.com/onflow/cadence/interpreter goos:linux goarch:amd64
ByteArrayTransfer-4	1.26µs ± 0%	1.23µs ± 0%	~	(p=1.000 n=1+1)
ByteArrayValueToByteSlice-4	88.0ns ± 0%	89.8ns ± 0%	~	(p=1.000 n=1+1)
ByteSliceToByteArrayValue-4	1.00µs ± 0%	1.00µs ± 0%	~	(p=1.000 n=1+1)
pkg:github.com/onflow/cadence/runtime goos:linux goarch:amd64
ContractFunctionInvocation-4	394µs ± 0%	438µs ± 0%	~	(p=1.000 n=1+1)
pkg:github.com/onflow/cadence/interpreter goos:linux goarch:amd64
EMVAddressTransfer-4	4.02µs ± 0%	3.74µs ± 0%	~	(p=1.000 n=1+1)
Emit-4	4.98ms ± 0%	5.03ms ± 0%	~	(p=1.000 n=1+1)
EnumTransfer-4	1.51µs ± 0%	1.35µs ± 0%	~	(p=1.000 n=1+1)
pkg:github.com/onflow/cadence/runtime goos:linux goarch:amd64
ExportType/composite_type-4	258ns ± 0%	264ns ± 0%	~	(p=1.000 n=1+1)
ExportType/simple_type-4	45.8ns ± 0%	46.1ns ± 0%	~	(p=1.000 n=1+1)
pkg:github.com/onflow/cadence/interpreter goos:linux goarch:amd64
ImperativeFib-4	24.6µs ± 0%	24.3µs ± 0%	~	(p=1.000 n=1+1)
InterpretRecursionFib-4	2.54ms ± 0%	2.45ms ± 0%	~	(p=1.000 n=1+1)
NewInterpreter/new_interpreter-4	963ns ± 0%	1035ns ± 0%	~	(p=1.000 n=1+1)
NewInterpreter/new_sub-interpreter-4	379ns ± 0%	358ns ± 0%	~	(p=1.000 n=1+1)
pkg:github.com/onflow/cadence/runtime goos:linux goarch:amd64
RuntimeFungibleTokenTransferInterpreter-4	679µs ± 0%	739µs ± 0%	~	(p=1.000 n=1+1)
RuntimeResourceDictionaryValues-4	3.04ms ± 0%	3.08ms ± 0%	~	(p=1.000 n=1+1)
RuntimeResourceTracking-4	11.2ms ± 0%	10.8ms ± 0%	~	(p=1.000 n=1+1)
RuntimeScriptNoop-4	15.3µs ± 0%	16.1µs ± 0%	~	(p=1.000 n=1+1)
RuntimeVMInvokeContractImperativeFib-4	47.0µs ± 0%	51.4µs ± 0%	~	(p=1.000 n=1+1)
pkg:github.com/onflow/cadence/interpreter goos:linux goarch:amd64
ValueIsSubtypeOfSemaType-4	64.9ns ± 0%	64.1ns ± 0%	~	(p=1.000 n=1+1)
	alloc/op		delta
pkg:github.com/onflow/cadence/interpreter goos:linux goarch:amd64
ByteArrayTransfer-4	1.07kB ± 0%	1.08kB ± 0%	~	(p=1.000 n=1+1)
ByteArrayValueToByteSlice-4	32.0B ± 0%	32.0B ± 0%	~	(all equal)
ByteSliceToByteArrayValue-4	849B ± 0%	855B ± 0%	~	(p=1.000 n=1+1)
pkg:github.com/onflow/cadence/runtime goos:linux goarch:amd64
ContractFunctionInvocation-4	145kB ± 0%	145kB ± 0%	~	(p=1.000 n=1+1)
pkg:github.com/onflow/cadence/interpreter goos:linux goarch:amd64
EMVAddressTransfer-4	2.51kB ± 0%	2.46kB ± 0%	~	(p=1.000 n=1+1)
Emit-4	1.54MB ± 0%	1.53MB ± 0%	~	(p=1.000 n=1+1)
EnumTransfer-4	834B ± 0%	832B ± 0%	~	(p=1.000 n=1+1)
pkg:github.com/onflow/cadence/runtime goos:linux goarch:amd64
ExportType/composite_type-4	112B ± 0%	112B ± 0%	~	(all equal)
ExportType/simple_type-4	0.00B	0.00B	~	(all equal)
pkg:github.com/onflow/cadence/interpreter goos:linux goarch:amd64
ImperativeFib-4	8.30kB ± 0%	8.30kB ± 0%	~	(all equal)
InterpretRecursionFib-4	1.17MB ± 0%	1.17MB ± 0%	~	(p=1.000 n=1+1)
NewInterpreter/new_interpreter-4	976B ± 0%	976B ± 0%	~	(all equal)
NewInterpreter/new_sub-interpreter-4	232B ± 0%	232B ± 0%	~	(all equal)
pkg:github.com/onflow/cadence/runtime goos:linux goarch:amd64
RuntimeFungibleTokenTransferInterpreter-4	174kB ± 0%	174kB ± 0%	~	(p=1.000 n=1+1)
RuntimeResourceDictionaryValues-4	1.78MB ± 0%	1.78MB ± 0%	~	(p=1.000 n=1+1)
RuntimeResourceTracking-4	6.94MB ± 0%	6.98MB ± 0%	~	(p=1.000 n=1+1)
RuntimeScriptNoop-4	8.07kB ± 0%	8.08kB ± 0%	~	(p=1.000 n=1+1)
RuntimeVMInvokeContractImperativeFib-4	14.3kB ± 0%	14.3kB ± 0%	~	(p=1.000 n=1+1)
pkg:github.com/onflow/cadence/interpreter goos:linux goarch:amd64
ValueIsSubtypeOfSemaType-4	32.0B ± 0%	32.0B ± 0%	~	(all equal)
	allocs/op		delta
pkg:github.com/onflow/cadence/interpreter goos:linux goarch:amd64
ByteArrayTransfer-4	7.00 ± 0%	7.00 ± 0%	~	(all equal)
ByteArrayValueToByteSlice-4	1.00 ± 0%	1.00 ± 0%	~	(all equal)
ByteSliceToByteArrayValue-4	5.00 ± 0%	5.00 ± 0%	~	(all equal)
pkg:github.com/onflow/cadence/runtime goos:linux goarch:amd64
ContractFunctionInvocation-4	2.23k ± 0%	2.23k ± 0%	~	(all equal)
pkg:github.com/onflow/cadence/interpreter goos:linux goarch:amd64
EMVAddressTransfer-4	29.0 ± 0%	29.0 ± 0%	~	(all equal)
Emit-4	41.0k ± 0%	41.0k ± 0%	~	(all equal)
EnumTransfer-4	13.0 ± 0%	13.0 ± 0%	~	(all equal)
pkg:github.com/onflow/cadence/runtime goos:linux goarch:amd64
ExportType/composite_type-4	2.00 ± 0%	2.00 ± 0%	~	(all equal)
ExportType/simple_type-4	0.00	0.00	~	(all equal)
pkg:github.com/onflow/cadence/interpreter goos:linux goarch:amd64
ImperativeFib-4	176 ± 0%	176 ± 0%	~	(all equal)
InterpretRecursionFib-4	16.5k ± 0%	16.5k ± 0%	~	(all equal)
NewInterpreter/new_interpreter-4	15.0 ± 0%	15.0 ± 0%	~	(all equal)
NewInterpreter/new_sub-interpreter-4	4.00 ± 0%	4.00 ± 0%	~	(all equal)
pkg:github.com/onflow/cadence/runtime goos:linux goarch:amd64
RuntimeFungibleTokenTransferInterpreter-4	3.21k ± 0%	3.21k ± 0%	~	(all equal)
RuntimeResourceDictionaryValues-4	36.7k ± 0%	36.7k ± 0%	~	(p=1.000 n=1+1)
RuntimeResourceTracking-4	128k ± 0%	128k ± 0%	~	(p=1.000 n=1+1)
RuntimeScriptNoop-4	113 ± 0%	113 ± 0%	~	(all equal)
RuntimeVMInvokeContractImperativeFib-4	481 ± 0%	481 ± 0%	~	(all equal)
pkg:github.com/onflow/cadence/interpreter goos:linux goarch:amd64
ValueIsSubtypeOfSemaType-4	1.00 ± 0%	1.00 ± 0%	~	(all equal)