From 86b4f8512b3196e35a747c0162004a6355b1737b Mon Sep 17 00:00:00 2001
From: Albert Alef <albertalef@protonmail.com>
Date: Thu, 11 Jun 2026 22:21:38 -0300
Subject: [PATCH 1/3] perf: improve boot speed

---
 bin/rubyshell            | 4 +++-
 lib/rubyshell.rb         | 4 ++--
 lib/rubyshell/chainer.rb | 1 -
 3 files changed, 5 insertions(+), 4 deletions(-)

diff --git a/bin/rubyshell b/bin/rubyshell
index 6cfc214..c6caa6d 100755
--- a/bin/rubyshell
+++ b/bin/rubyshell
@@ -1,6 +1,8 @@
-#!/usr/bin/env ruby
+#!/usr/bin/env -S ruby --disable-gems
 # frozen_string_literal: true
 
+$LOAD_PATH.unshift(File.expand_path("../lib", __dir__))
+
 require "rubyshell"
 
 if ARGV.first&.strip&.start_with? "exec"
diff --git a/lib/rubyshell.rb b/lib/rubyshell.rb
index c97ade9..0dc63e1 100644
--- a/lib/rubyshell.rb
+++ b/lib/rubyshell.rb
@@ -1,7 +1,5 @@
 # frozen_string_literal: true
 
-require "logger"
-
 require_relative "rubyshell/version"
 require_relative "rubyshell/command"
 require_relative "rubyshell/chainer"
@@ -43,6 +41,8 @@ def debug?
     attr_writer :logger
 
     def logger
+      require "logger"
+
       @logger ||= Logger.new($stdout)
     end
 
diff --git a/lib/rubyshell/chainer.rb b/lib/rubyshell/chainer.rb
index 512c676..ab32002 100644
--- a/lib/rubyshell/chainer.rb
+++ b/lib/rubyshell/chainer.rb
@@ -1,6 +1,5 @@
 # frozen_string_literal: true
 
-require "debug"
 module RubyShell
   class Chainer
     attr_reader :parts, :options

From f1468d94d568e4a2198e31479edcb0fd51161a46 Mon Sep 17 00:00:00 2001
From: Albert Alef <albertalef@protonmail.com>
Date: Thu, 11 Jun 2026 22:24:19 -0300
Subject: [PATCH 2/3] perf: remove redundant pooling

---
 lib/rubyshell/terminal_executor.rb | 16 ++++------------
 1 file changed, 4 insertions(+), 12 deletions(-)

diff --git a/lib/rubyshell/terminal_executor.rb b/lib/rubyshell/terminal_executor.rb
index 3daff1d..6bd1c70 100644
--- a/lib/rubyshell/terminal_executor.rb
+++ b/lib/rubyshell/terminal_executor.rb
@@ -4,8 +4,6 @@
 
 module RubyShell
   module TerminalExecutor
-    SELECT_TIMEOUT = Rational(1, 20).freeze
-
     def self.capture(command, options) # rubocop:disable Metris/MethodLength,Metrics/CyclomaticComplexity,Metrix/AbcSize,Metrics/PerceivedComplexity
       stdin_value = if options[:_stdin].is_a?(RubyShell::Command) || options[:_stdin].is_a?(RubyShell::Chainer)
                       options[:_stdin].exec
@@ -27,17 +25,11 @@ def self.capture(command, options) # rubocop:disable Metris/MethodLength,Metrics
         error = +""
         ios = { stdout => output, stderr => error }
 
-        status = nil
-
-        # What was my idea here:
-        # If has not any io readable and the program exited in the previous loop, stop
+        # Block until a pipe has data (or hits EOF) instead of polling, so we
+        # dont burn a CPU core spinning while the command runs.
+        # EOF on both pipes empties ios and ends the loop, then we reap the exit status
         until ios.empty?
-          status ||= w_thread.join(0)
-
-          readable, = IO.select(ios.keys, nil, nil, 0)
-
-          break if !readable && status
-          next unless readable
+          readable, = IO.select(ios.keys)
 
           readable.each do |io|
             loop do

From a6feb255331e27b3bd30b725abd10ed53f1d9222 Mon Sep 17 00:00:00 2001
From: Albert Alef <albertalef@protonmail.com>
Date: Thu, 11 Jun 2026 22:39:13 -0300
Subject: [PATCH 3/3] fix: revert regression

---
 lib/rubyshell/terminal_executor.rb | 16 ++++++++++++----
 1 file changed, 12 insertions(+), 4 deletions(-)

diff --git a/lib/rubyshell/terminal_executor.rb b/lib/rubyshell/terminal_executor.rb
index 6bd1c70..1252391 100644
--- a/lib/rubyshell/terminal_executor.rb
+++ b/lib/rubyshell/terminal_executor.rb
@@ -4,6 +4,8 @@
 
 module RubyShell
   module TerminalExecutor
+    SELECT_TIMEOUT = Rational(1, 20).freeze
+
     def self.capture(command, options) # rubocop:disable Metris/MethodLength,Metrics/CyclomaticComplexity,Metrix/AbcSize,Metrics/PerceivedComplexity
       stdin_value = if options[:_stdin].is_a?(RubyShell::Command) || options[:_stdin].is_a?(RubyShell::Chainer)
                       options[:_stdin].exec
@@ -25,11 +27,17 @@ def self.capture(command, options) # rubocop:disable Metris/MethodLength,Metrics
         error = +""
         ios = { stdout => output, stderr => error }
 
-        # Block until a pipe has data (or hits EOF) instead of polling, so we
-        # dont burn a CPU core spinning while the command runs.
-        # EOF on both pipes empties ios and ends the loop, then we reap the exit status
+        status = nil
+
+        # What was my idea here:
+        # If has not any io readable and the program exited in the previous loop, stop
         until ios.empty?
-          readable, = IO.select(ios.keys)
+          status ||= w_thread.join(0)
+
+          readable, = IO.select(ios.keys, nil, nil, SELECT_TIMEOUT)
+
+          break if !readable && status
+          next unless readable
 
           readable.each do |io|
             loop do