built-in cp performance issue #14778
Description
Describe the bug
The built-in cp seems to perform rather badly compared to GNU coreutils cp.
How to reproduce
> timeit ^cp -r cymbol_out/ cymbol_out_bak
2sec 291ms 42µs 609ns
> timeit ^rm -rf cymbol_out_bak
6ms 38µs 704ns
> timeit cp -r cymbol_out/ cymbol_out_bak
51sec 978ms 794µs 94ns
> timeit rm -rf cymbol_out_bak
62µs 774ns
> ls cymbol_out/
──────────────────────────────────────┬──────┬───────────┬──────────────
name │ type │ size │ modified
──────────────────────────────────────┼──────┼───────────┼──────────────
cymbol_out/GenericClass.json │ file │ 4.8 MiB │ 9 hours ago
cymbol_out/cymbol_cc.json │ file │ 10.9 MiB │ 10 hours ago
cymbol_out/Location.json │ file │ 467.2 MiB │ 9 hours ago
cymbol_out/FunctionBody.json │ file │ 181.3 MiB │ 9 hours ago
cymbol_out/Attribute.json │ file │ 165.1 MiB │ 9 hours ago
cymbol_out/Method.json │ file │ 160.8 MiB │ 9 hours ago
cymbol_out/Access.json │ file │ 167.8 MiB │ 9 hours ago
cymbol_out/infusion_snapshot.json │ file │ 222 B │ 9 hours ago
cymbol_out/LocalVariable.json │ file │ 247.4 MiB │ 9 hours ago
cymbol_out/LocationWithReceiver.json │ file │ 430.5 MiB │ 9 hours ago
cymbol_out/GlobalFunction.json │ file │ 29.5 MiB │ 9 hours ago
cymbol_out/Package.json │ file │ 3.2 MiB │ 9 hours ago
cymbol_out/Call.json │ file │ 334.2 MiB │ 9 hours ago
cymbol_out/Module.json │ file │ 28.8 MiB │ 9 hours ago
cymbol_out/System.json │ file │ 217.7 KiB │ 9 hours ago
cymbol_out/InheritanceRelation.json │ file │ 4.7 MiB │ 9 hours ago
cymbol_out/GlobalVariable.json │ file │ 12.0 MiB │ 9 hours ago
cymbol_out/File.json │ file │ 32.6 MiB │ 9 hours ago
cymbol_out/Namespace.json │ file │ 1.9 MiB │ 9 hours ago
cymbol_out/Class.json │ file │ 40.7 MiB │ 9 hours ago
cymbol_out/Parameter.json │ file │ 210.2 MiB │ 9 hours ago
cymbol_out/TypedefDecorator.json │ file │ 6.0 MiB │ 9 hours ago
cymbol_out/Union.json │ file │ 110.1 KiB │ 9 hours ago
cymbol_out/Subsystem.json │ file │ 1.4 MiB │ 9 hours ago
cymbol_out/Primitive.json │ file │ 2.8 KiB │ 9 hours ago
──────────────────────────────────────┴──────┴───────────┴──────────────Expected behavior
built-in cp performs comparably with GNU coreutils cp.
Configuration
> version | transpose key value | to md --pretty
| key | value |
| ------------------ | ------------------------------------------- |
| version | 0.100.0 |
| major | 0 |
| minor | 100 |
| patch | 0 |
| branch | |
| commit_hash | |
| build_os | linux-x86_64 |
| build_target | x86_64-unknown-linux-gnu |
| rust_version | rustc 1.84.0-nightly (798fb83f7 2024-10-16) |
| rust_channel | nightly-x86_64-unknown-linux-gnu |
| cargo_version | cargo 1.84.0-nightly (8c30ce536 2024-10-15) |
| build_time | 2024-12-17 08:59:22 +08:00 |
| build_rust_channel | release |
| allocator | mimalloc |
| features | default, sqlite, trash |
| installed_plugins | gstat 0.100.0, polars 0.100.0 |