upstream/mercurial-mirror Files · rust/rhg/src/commands/debugrequirements.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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             debugrequirements.rs
        
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             | 598 B
            
                | application/rls-services+xml
            
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             / rust / rhg / src / commands / debugrequirements.rs
          
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      use crate::error::CommandError;

      pub const HELP_TEXT: &str = "

      Print the current repo requirements.

      ";

      pub fn args() -> clap::Command {

          clap::command!("debugrequirements").about(HELP_TEXT)

      }

      pub fn run(invocation: &crate::CliInvocation) -> Result<(), CommandError> {

          let repo = invocation.repo?;

          let mut output = String::new();

          let mut requirements: Vec<_> = repo.requirements().iter().collect();

          requirements.sort();

          for req in requirements {

              output.push_str(req);

              output.push('\n');

          }

          invocation.ui.write_stdout(output.as_bytes())?;

          Ok(())

      }

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				use crate::error::CommandError;

				pub const HELP_TEXT: &str = "
				Print the current repo requirements.
				";

				pub fn args() -> clap::Command {
				clap::command!("debugrequirements").about(HELP_TEXT)
				}

				pub fn run(invocation: &crate::CliInvocation) -> Result<(), CommandError> {
				let repo = invocation.repo?;
				let mut output = String::new();
				let mut requirements: Vec<_> = repo.requirements().iter().collect();
				requirements.sort();
				for req in requirements {
				output.push_str(req);
				output.push('\n');
				}
				invocation.ui.write_stdout(output.as_bytes())?;
				Ok(())
				}