upstream/mercurial-mirror Files · rust/hg-cpython/src/debug.rs

worker: avoid reading 1 byte at a time from the OS pipe...

worker: avoid reading 1 byte at a time from the OS pipe Apparently `pickle.load` does a lot of small reads, many of them literally 1-byte, so it benefits greatly from buffering. This change enables the buffering, at the cost of more complicated interaction with the `selector` API. On one repository with ~400k files this reduces the time by about ~30s, from ~60 to ~30s. The difference is so large because the actual updating work is parallellized, while these small reads are bottlenecking the central hg process.

Raphaël Gomès - - Load All Authors

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             debug.rs
        
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                | application/rls-services+xml
            
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             / rust / hg-cpython / src / debug.rs
          
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      // debug.rs

      //

      // Copyright 2020 Raphaël Gomès <rgomes@octobus.net>

      //

      // This software may be used and distributed according to the terms of the

      // GNU General Public License version 2 or any later version.

      //! Module to get debug information about Rust extensions.

      use cpython::{PyDict, PyModule, PyResult, Python};

      /// Create the module, with `__package__` given from parent

      pub fn init_module(py: Python, package: &str) -> PyResult<PyModule> {

          let dotted_name = &format!("{}.debug", package);

          let m = PyModule::new(py, dotted_name)?;

          m.add(py, "__package__", package)?;

          m.add(py, "__doc__", "Rust debugging information")?;

          let sys = PyModule::import(py, "sys")?;

          let sys_modules: PyDict = sys.get(py, "modules")?.extract(py)?;

          sys_modules.set_item(py, dotted_name, &m)?;

          Ok(m)

      }

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				// debug.rs
				//
				// Copyright 2020 Raphaël Gomès <rgomes@octobus.net>
				//
				// This software may be used and distributed according to the terms of the
				// GNU General Public License version 2 or any later version.

				//! Module to get debug information about Rust extensions.
				use cpython::{PyDict, PyModule, PyResult, Python};

				/// Create the module, with `__package__` given from parent
				pub fn init_module(py: Python, package: &str) -> PyResult<PyModule> {
				let dotted_name = &format!("{}.debug", package);
				let m = PyModule::new(py, dotted_name)?;

				m.add(py, "__package__", package)?;
				m.add(py, "__doc__", "Rust debugging information")?;

				let sys = PyModule::import(py, "sys")?;
				let sys_modules: PyDict = sys.get(py, "modules")?.extract(py)?;
				sys_modules.set_item(py, dotted_name, &m)?;

				Ok(m)
				}