5f08a01cf4
Defer locals dict allocation for function frames until first access. Most function frames only use fastlocals and never touch the locals dict, so this skips one dict heap allocation per function call. Also remove a redundant code.clone() in invoke_with_locals. Func call ~23% faster, method call ~15% faster in benchmarks.
Benchmarking
These are some files to determine performance of rustpython.
Usage
Running cargo bench from the root of the repository will start the benchmarks. Once done there will be a graphical
report under target/criterion/report/index.html that you can use use to view the results.
cargo bench supports name matching to run a subset of the benchmarks. To
run only the sorted microbenchmark, you can run:
cargo bench sorted
To view Python tracebacks during benchmarks, run RUST_BACKTRACE=1 cargo bench. You can also bench against a
specific installed Python version by running:
PYTHON_SYS_EXECUTABLE=python3.13 cargo bench
Adding a benchmark
Simply adding a file to the benchmarks/ directory will add it to the set of files benchmarked. Each file is tested
in two ways:
- The time to parse the file to AST
- The time it takes to execute the file
Adding a micro benchmark
Micro benchmarks are small snippets of code added under the microbenchmarks/ directory. A microbenchmark file has
two sections:
- Optional setup code
- The code to be benchmarked
These two sections are delimited by # ---. For example:
a_list = [1,2,3]
# ---
len(a_list)
Only len(a_list) will be timed. Setup or benchmarked code can optionally reference a variable called ITERATIONS. If
present then the benchmark code will be invoked 5 times with ITERATIONS set to a value between 100 and 1,000. For
example:
obj = [i for i in range(ITERATIONS)]
ITERATIONS can appear in both the setup code and the benchmark code.
MacOS setup
On MacOS you will need to add the following to a .cargo/config file:
[target.x86_64-apple-darwin]
rustflags = [
"-C", "link-arg=-undefined",
"-C", "link-arg=dynamic_lookup",
]