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Bug #15856

Updated by sawa (Tsuyoshi Sawada) over 1 year ago

With many activated gems activated, the performance of `Kernel.require` (renamed `Kernel.gem_original_require` Kernel.require (aka Kernel.gem_original_require after rubygems is loaded) is slow very slow, even when `require` in the case where the require has already been called loaded (the redundant idempotent case). 

 This What it looks like is likely because its happening is every time it needs to resolve the string argument needs to be resolved to a pathname in order to be compared compare against a cache of already loaded paths shared between `require` paths.    Since require and `require_relative`. But it require_relative need to be able to share state this makes sense to do, but this becomes very expensive with lots of activated gems, particularly on windows, where `open`/`stat` windows (where open/stat on windows is ten times 10x more expensive than on linux. linux). 

 `require` What probably needs to happen is that for require (but not `require_relative`, require_relative which is already fairly fast) probably there needs to a be another layer of redundancy idempotency checking that examines if happens which compares only the string argument exists as in a `Hash` Hash to see if the key exists or not (which I believe is likely the old way `require` that require used to work before `require_relative` require_relative was introduced).    The That means that on the second time a `require` require line is processed, was processed it would find the that value `true` was true and would short circuit without doing any File I/O to resolve the filename.    Of course on the first time, time it still would still need to do the check resolve to the argument to full path and still maintain the that cache so that `require` require and `require_relative` are require_relative were still redundant idempotent between them. 

 After testing, doing some testing I don't think this would introduce any user-visible behavior changes changes, since `require` requires lines should always be redundant. idempotent.    I thought it would fix some bugs, actual bugs in behavior but I could not let was unable to "trick" the existing loader double-load into double-loading a `require` requires line even though I tried to install installing and activate activating gems after requiring having already required system libs.    Since I couldn't find any bugs, though, which that also means that this should be backward compatible. backwards compatible with existing behavior. 

 An strace of the process of a single `require "openssl"` "openssl"`, after it has been already required looks like this: 

 ``` 
 open("/opt/chef/embedded/lib/ruby/gems/2.6.0/gems/uuidtools-2.1.5/lib/openssl.rb", O_RDONLY|O_NONBLOCK|O_CLOEXEC) = -1 ENOENT (No such file or directory) 
 open("/opt/chef/embedded/lib/ruby/gems/2.6.0/gems/chef-bin-15.0.276/lib/openssl.rb", O_RDONLY|O_NONBLOCK|O_CLOEXEC) = -1 ENOENT (No such file or directory) 
 open("/opt/chef/embedded/lib/ruby/gems/2.6.0/gems/public_suffix-3.0.3/lib/openssl.rb", O_RDONLY|O_NONBLOCK|O_CLOEXEC) = -1 ENOENT (No such file or directory) 
 open("/opt/chef/embedded/lib/ruby/gems/2.6.0/gems/addressable-2.6.0/lib/openssl.rb", O_RDONLY|O_NONBLOCK|O_CLOEXEC) = -1 ENOENT (No such file or directory) 
 open("/opt/chef/embedded/lib/ruby/gems/2.6.0/gems/mixlib-shellout-2.4.4/lib/openssl.rb", O_RDONLY|O_NONBLOCK|O_CLOEXEC) = -1 ENOENT (No such file or directory) 
 open("/opt/chef/embedded/lib/ruby/gems/2.6.0/gems/mixlib-cli-2.0.3/lib/openssl.rb", O_RDONLY|O_NONBLOCK|O_CLOEXEC) = -1 ENOENT (No such file or directory) 
 open("/opt/chef/embedded/lib/ruby/gems/2.6.0/gems/appbundler-0.12.5/lib/openssl.rb", O_RDONLY|O_NONBLOCK|O_CLOEXEC) = -1 ENOENT (No such file or directory) 
 open("/opt/chef/embedded/lib/ruby/gems/2.6.0/gems/bcrypt_pbkdf-1.0.1/lib/openssl.rb", O_RDONLY|O_NONBLOCK|O_CLOEXEC) = -1 ENOENT (No such file or directory) 
 open("/opt/chef/embedded/lib/ruby/gems/2.6.0/extensions/x86_64-linux/2.6.0/bcrypt_pbkdf-1.0.1/openssl.rb", O_RDONLY|O_NONBLOCK|O_CLOEXEC) = -1 ENOENT (No such file or directory) 
 open("/opt/chef/embedded/lib/ruby/gems/2.6.0/gems/debug_inspector-0.0.3/lib/openssl.rb", O_RDONLY|O_NONBLOCK|O_CLOEXEC) = -1 ENOENT (No such file or directory) 
 open("/opt/chef/embedded/lib/ruby/gems/2.6.0/extensions/x86_64-linux/2.6.0/debug_inspector-0.0.3/openssl.rb", O_RDONLY|O_NONBLOCK|O_CLOEXEC) = -1 ENOENT (No such file or directory) 
 open("/opt/chef/embedded/lib/ruby/gems/2.6.0/gems/binding_of_caller-0.8.0/lib/openssl.rb", O_RDONLY|O_NONBLOCK|O_CLOEXEC) = -1 ENOENT (No such file or directory) 
 open("/opt/chef/embedded/lib/ruby/gems/2.6.0/extensions/x86_64-linux/2.6.0/binding_of_caller-0.8.0/openssl.rb", O_RDONLY|O_NONBLOCK|O_CLOEXEC) = -1 ENOENT (No such file or directory) 
 open("/opt/chef/embedded/lib/ruby/gems/2.6.0/gems/builder-3.2.3/lib/openssl.rb", O_RDONLY|O_NONBLOCK|O_CLOEXEC) = -1 ENOENT (No such file or directory) 
 open("/opt/chef/embedded/lib/ruby/gems/2.6.0/gems/byebug-11.0.1/lib/openssl.rb", O_RDONLY|O_NONBLOCK|O_CLOEXEC) = -1 ENOENT (No such file or directory) 
 open("/opt/chef/embedded/lib/ruby/gems/2.6.0/extensions/x86_64-linux/2.6.0/byebug-11.0.1/openssl.rb", O_RDONLY|O_NONBLOCK|O_CLOEXEC) = -1 ENOENT (No such file or directory) 
 open("/opt/chef/embedded/lib/ruby/gems/2.6.0/gems/tomlrb-1.2.8/lib/openssl.rb", O_RDONLY|O_NONBLOCK|O_CLOEXEC) = -1 ENOENT (No such file or directory) 
 open("/opt/chef/embedded/lib/ruby/gems/2.6.0/gems/mixlib-config-3.0.1/lib/openssl.rb", O_RDONLY|O_NONBLOCK|O_CLOEXEC) = -1 ENOENT (No such file or directory) 
 open("/opt/chef/embedded/lib/ruby/gems/2.6.0/gems/fuzzyurl-0.9.0/lib/openssl.rb", O_RDONLY|O_NONBLOCK|O_CLOEXEC) = -1 ENOENT (No such file or directory) 
 open("/opt/chef/embedded/lib/ruby/gems/2.6.0/gems/chef-config-15.0.276/lib/openssl.rb", O_RDONLY|O_NONBLOCK|O_CLOEXEC) = -1 ENOENT (No such file or directory) 
 open("/opt/chef/embedded/lib/ruby/gems/2.6.0/gems/net-ssh-5.2.0/lib/openssl.rb", O_RDONLY|O_NONBLOCK|O_CLOEXEC) = -1 ENOENT (No such file or directory) 
 open("/opt/chef/embedded/lib/ruby/gems/2.6.0/gems/net-scp-2.0.0/lib/openssl.rb", O_RDONLY|O_NONBLOCK|O_CLOEXEC) = -1 ENOENT (No such file or directory) 
 open("/opt/chef/embedded/lib/ruby/gems/2.6.0/gems/erubis-2.7.0/lib/openssl.rb", O_RDONLY|O_NONBLOCK|O_CLOEXEC) = -1 ENOENT (No such file or directory) 
 open("/opt/chef/embedded/lib/ruby/gems/2.6.0/gems/ffi-1.10.0/lib/openssl.rb", O_RDONLY|O_NONBLOCK|O_CLOEXEC) = -1 ENOENT (No such file or directory) 
 open("/opt/chef/embedded/lib/ruby/gems/2.6.0/extensions/x86_64-linux/2.6.0/ffi-1.10.0/openssl.rb", O_RDONLY|O_NONBLOCK|O_CLOEXEC) = -1 ENOENT (No such file or directory) 
 open("/opt/chef/embedded/lib/ruby/gems/2.6.0/gems/gssapi-1.3.0/lib/openssl.rb", O_RDONLY|O_NONBLOCK|O_CLOEXEC) = -1 ENOENT (No such file or directory) 
 open("/opt/chef/embedded/lib/ruby/gems/2.6.0/gems/gyoku-1.3.1/lib/openssl.rb", O_RDONLY|O_NONBLOCK|O_CLOEXEC) = -1 ENOENT (No such file or directory) 
 open("/opt/chef/embedded/lib/ruby/gems/2.6.0/gems/httpclient-2.8.3/lib/openssl.rb", O_RDONLY|O_NONBLOCK|O_CLOEXEC) = -1 ENOENT (No such file or directory) 
 open("/opt/chef/embedded/lib/ruby/gems/2.6.0/gems/little-plugger-1.1.4/lib/openssl.rb", O_RDONLY|O_NONBLOCK|O_CLOEXEC) = -1 ENOENT (No such file or directory) 
 open("/opt/chef/embedded/lib/ruby/gems/2.6.0/gems/multi_json-1.13.1/lib/openssl.rb", O_RDONLY|O_NONBLOCK|O_CLOEXEC) = -1 ENOENT (No such file or directory) 
 open("/opt/chef/embedded/lib/ruby/gems/2.6.0/gems/logging-2.2.2/lib/openssl.rb", O_RDONLY|O_NONBLOCK|O_CLOEXEC) = -1 ENOENT (No such file or directory) 
 open("/opt/chef/embedded/lib/ruby/gems/2.6.0/gems/nori-2.6.0/lib/openssl.rb", O_RDONLY|O_NONBLOCK|O_CLOEXEC) = -1 ENOENT (No such file or directory) 
 open("/opt/chef/embedded/lib/ruby/gems/2.6.0/gems/rubyntlm-0.6.2/lib/openssl.rb", O_RDONLY|O_NONBLOCK|O_CLOEXEC) = -1 ENOENT (No such file or directory) 
 open("/opt/chef/embedded/lib/ruby/gems/2.6.0/gems/winrm-2.3.2/lib/openssl.rb", O_RDONLY|O_NONBLOCK|O_CLOEXEC) = -1 ENOENT (No such file or directory) 
 open("/opt/chef/embedded/lib/ruby/gems/2.6.0/gems/rubyzip-1.2.2/lib/openssl.rb", O_RDONLY|O_NONBLOCK|O_CLOEXEC) = -1 ENOENT (No such file or directory) 
 open("/opt/chef/embedded/lib/ruby/gems/2.6.0/gems/winrm-fs-1.3.2/lib/openssl.rb", O_RDONLY|O_NONBLOCK|O_CLOEXEC) = -1 ENOENT (No such file or directory) 
 open("/opt/chef/embedded/lib/ruby/gems/2.6.0/gems/train-core-2.1.0/lib/openssl.rb", O_RDONLY|O_NONBLOCK|O_CLOEXEC) = -1 ENOENT (No such file or directory) 
 open("/opt/chef/embedded/lib/ruby/gems/2.6.0/gems/equatable-0.5.0/lib/openssl.rb", O_RDONLY|O_NONBLOCK|O_CLOEXEC) = -1 ENOENT (No such file or directory) 
 open("/opt/chef/embedded/lib/ruby/gems/2.6.0/gems/tty-color-0.4.3/lib/openssl.rb", O_RDONLY|O_NONBLOCK|O_CLOEXEC) = -1 ENOENT (No such file or directory) 
 open("/opt/chef/embedded/lib/ruby/gems/2.6.0/gems/pastel-0.7.2/lib/openssl.rb", O_RDONLY|O_NONBLOCK|O_CLOEXEC) = -1 ENOENT (No such file or directory) 
 open("/opt/chef/embedded/lib/ruby/gems/2.6.0/gems/tty-cursor-0.6.1/lib/openssl.rb", O_RDONLY|O_NONBLOCK|O_CLOEXEC) = -1 ENOENT (No such file or directory) 
 open("/opt/chef/embedded/lib/ruby/gems/2.6.0/gems/strings-ansi-0.1.0/lib/openssl.rb", O_RDONLY|O_NONBLOCK|O_CLOEXEC) = -1 ENOENT (No such file or directory) 
 open("/opt/chef/embedded/lib/ruby/gems/2.6.0/gems/unicode_utils-1.4.0/lib/openssl.rb", O_RDONLY|O_NONBLOCK|O_CLOEXEC) = -1 ENOENT (No such file or directory) 
 open("/opt/chef/embedded/lib/ruby/gems/2.6.0/gems/unicode-display_width-1.4.1/lib/openssl.rb", O_RDONLY|O_NONBLOCK|O_CLOEXEC) = -1 ENOENT (No such file or directory) 
 open("/opt/chef/embedded/lib/ruby/gems/2.6.0/gems/strings-0.1.4/lib/openssl.rb", O_RDONLY|O_NONBLOCK|O_CLOEXEC) = -1 ENOENT (No such file or directory) 
 open("/opt/chef/embedded/lib/ruby/gems/2.6.0/gems/tty-box-0.3.0/lib/openssl.rb", O_RDONLY|O_NONBLOCK|O_CLOEXEC) = -1 ENOENT (No such file or directory) 
 open("/opt/chef/embedded/lib/ruby/gems/2.6.0/gems/necromancer-0.4.0/lib/openssl.rb", O_RDONLY|O_NONBLOCK|O_CLOEXEC) = -1 ENOENT (No such file or directory) 
 open("/opt/chef/embedded/lib/ruby/gems/2.6.0/gems/timers-4.3.0/lib/openssl.rb", O_RDONLY|O_NONBLOCK|O_CLOEXEC) = -1 ENOENT (No such file or directory) 
 open("/opt/chef/embedded/lib/ruby/gems/2.6.0/gems/wisper-2.0.0/lib/openssl.rb", O_RDONLY|O_NONBLOCK|O_CLOEXEC) = -1 ENOENT (No such file or directory) 
 open("/opt/chef/embedded/lib/ruby/gems/2.6.0/gems/tty-screen-0.6.5/lib/openssl.rb", O_RDONLY|O_NONBLOCK|O_CLOEXEC) = -1 ENOENT (No such file or directory) 
 open("/opt/chef/embedded/lib/ruby/gems/2.6.0/gems/tty-reader-0.5.0/lib/openssl.rb", O_RDONLY|O_NONBLOCK|O_CLOEXEC) = -1 ENOENT (No such file or directory) 
 open("/opt/chef/embedded/lib/ruby/gems/2.6.0/gems/tty-prompt-0.18.1/lib/openssl.rb", O_RDONLY|O_NONBLOCK|O_CLOEXEC) = -1 ENOENT (No such file or directory) 
 open("/opt/chef/embedded/lib/ruby/gems/2.6.0/gems/license-acceptance-1.0.5/lib/openssl.rb", O_RDONLY|O_NONBLOCK|O_CLOEXEC) = -1 ENOENT (No such file or directory) 
 open("/opt/chef/embedded/lib/ruby/gems/2.6.0/gems/mixlib-log-3.0.1/lib/openssl.rb", O_RDONLY|O_NONBLOCK|O_CLOEXEC) = -1 ENOENT (No such file or directory) 
 open("/opt/chef/embedded/lib/ruby/gems/2.6.0/gems/mixlib-authentication-2.1.1/lib/openssl.rb", O_RDONLY|O_NONBLOCK|O_CLOEXEC) = -1 ENOENT (No such file or directory) 
 open("/opt/chef/embedded/lib/ruby/gems/2.6.0/gems/mixlib-archive-1.0.1/lib/openssl.rb", O_RDONLY|O_NONBLOCK|O_CLOEXEC) = -1 ENOENT (No such file or directory) 
 open("/opt/chef/embedded/lib/ruby/gems/2.6.0/gems/systemu-2.6.5/lib/openssl.rb", O_RDONLY|O_NONBLOCK|O_CLOEXEC) = -1 ENOENT (No such file or directory) 
 open("/opt/chef/embedded/lib/ruby/gems/2.6.0/gems/libyajl2-1.2.0/lib/openssl.rb", O_RDONLY|O_NONBLOCK|O_CLOEXEC) = -1 ENOENT (No such file or directory) 
 open("/opt/chef/embedded/lib/ruby/gems/2.6.0/extensions/x86_64-linux/2.6.0/libyajl2-1.2.0/openssl.rb", O_RDONLY|O_NONBLOCK|O_CLOEXEC) = -1 ENOENT (No such file or directory) 
 open("/opt/chef/embedded/lib/ruby/gems/2.6.0/gems/ffi-yajl-2.3.1/lib/openssl.rb", O_RDONLY|O_NONBLOCK|O_CLOEXEC) = -1 ENOENT (No such file or directory) 
 open("/opt/chef/embedded/lib/ruby/gems/2.6.0/extensions/x86_64-linux/2.6.0/ffi-yajl-2.3.1/openssl.rb", O_RDONLY|O_NONBLOCK|O_CLOEXEC) = -1 ENOENT (No such file or directory) 
 open("/opt/chef/embedded/lib/ruby/gems/2.6.0/gems/plist-3.5.0/lib/openssl.rb", O_RDONLY|O_NONBLOCK|O_CLOEXEC) = -1 ENOENT (No such file or directory) 
 open("/opt/chef/embedded/lib/ruby/gems/2.6.0/gems/ipaddress-0.8.3/lib/openssl.rb", O_RDONLY|O_NONBLOCK|O_CLOEXEC) = -1 ENOENT (No such file or directory) 
 open("/opt/chef/embedded/lib/ruby/gems/2.6.0/gems/wmi-lite-1.0.2/lib/openssl.rb", O_RDONLY|O_NONBLOCK|O_CLOEXEC) = -1 ENOENT (No such file or directory) 
 open("/opt/chef/embedded/lib/ruby/gems/2.6.0/gems/ohai-15.0.34/lib/openssl.rb", O_RDONLY|O_NONBLOCK|O_CLOEXEC) = -1 ENOENT (No such file or directory) 
 open("/opt/chef/embedded/lib/ruby/gems/2.6.0/gems/net-ssh-gateway-2.0.0/lib/openssl.rb", O_RDONLY|O_NONBLOCK|O_CLOEXEC) = -1 ENOENT (No such file or directory) 
 open("/opt/chef/embedded/lib/ruby/gems/2.6.0/gems/net-ssh-multi-1.2.1/lib/openssl.rb", O_RDONLY|O_NONBLOCK|O_CLOEXEC) = -1 ENOENT (No such file or directory) 
 open("/opt/chef/embedded/lib/ruby/gems/2.6.0/gems/net-sftp-2.1.2/lib/openssl.rb", O_RDONLY|O_NONBLOCK|O_CLOEXEC) = -1 ENOENT (No such file or directory) 
 open("/opt/chef/embedded/lib/ruby/gems/2.6.0/gems/ed25519-1.2.4/lib/openssl.rb", O_RDONLY|O_NONBLOCK|O_CLOEXEC) = -1 ENOENT (No such file or directory) 
 open("/opt/chef/embedded/lib/ruby/gems/2.6.0/extensions/x86_64-linux/2.6.0/ed25519-1.2.4/openssl.rb", O_RDONLY|O_NONBLOCK|O_CLOEXEC) = -1 ENOENT (No such file or directory) 
 open("/opt/chef/embedded/lib/ruby/gems/2.6.0/gems/highline-1.7.10/lib/openssl.rb", O_RDONLY|O_NONBLOCK|O_CLOEXEC) = -1 ENOENT (No such file or directory) 
 open("/opt/chef/embedded/lib/ruby/gems/2.6.0/gems/diff-lcs-1.3/lib/openssl.rb", O_RDONLY|O_NONBLOCK|O_CLOEXEC) = -1 ENOENT (No such file or directory) 
 open("/opt/chef/embedded/lib/ruby/gems/2.6.0/gems/ffi-libarchive-0.4.6/lib/openssl.rb", O_RDONLY|O_NONBLOCK|O_CLOEXEC) = -1 ENOENT (No such file or directory) 
 open("/opt/chef/embedded/lib/ruby/gems/2.6.0/gems/hashie-3.6.0/lib/openssl.rb", O_RDONLY|O_NONBLOCK|O_CLOEXEC) = -1 ENOENT (No such file or directory) 
 open("/opt/chef/embedded/lib/ruby/gems/2.6.0/gems/uuidtools-2.1.5/lib/openssl.rb", O_RDONLY|O_NONBLOCK|O_CLOEXEC) = -1 ENOENT (No such file or directory) 
 open("/opt/chef/embedded/lib/ruby/gems/2.6.0/gems/rack-2.0.7/lib/openssl.rb", O_RDONLY|O_NONBLOCK|O_CLOEXEC) = -1 ENOENT (No such file or directory) 
 open("/opt/chef/embedded/lib/ruby/gems/2.6.0/gems/chef-zero-14.0.12/lib/openssl.rb", O_RDONLY|O_NONBLOCK|O_CLOEXEC) = -1 ENOENT (No such file or directory) 
 open("/opt/chef/embedded/lib/ruby/gems/2.6.0/gems/iniparse-1.4.4/lib/openssl.rb", O_RDONLY|O_NONBLOCK|O_CLOEXEC) = -1 ENOENT (No such file or directory) 
 open("/opt/chef/embedded/lib/ruby/gems/2.6.0/gems/syslog-logger-1.6.8/lib/openssl.rb", O_RDONLY|O_NONBLOCK|O_CLOEXEC) = -1 ENOENT (No such file or directory) 
 open("/opt/chef/embedded/lib/ruby/gems/2.6.0/gems/proxifier-1.0.3/lib/openssl.rb", O_RDONLY|O_NONBLOCK|O_CLOEXEC) = -1 ENOENT (No such file or directory) 
 open("/opt/chef/embedded/lib/ruby/gems/2.6.0/gems/chef-15.0.276/lib/openssl.rb", O_RDONLY|O_NONBLOCK|O_CLOEXEC) = -1 ENOENT (No such file or directory) 
 open("/opt/chef/embedded/lib/ruby/gems/2.6.0/gems/chef-bin-15.0.276/lib/openssl.rb", O_RDONLY|O_NONBLOCK|O_CLOEXEC) = -1 ENOENT (No such file or directory) 
 open("/opt/chef/embedded/lib/ruby/gems/2.6.0/gems/chef-vault-3.4.3/lib/openssl.rb", O_RDONLY|O_NONBLOCK|O_CLOEXEC) = -1 ENOENT (No such file or directory) 
 open("/opt/chef/embedded/lib/ruby/gems/2.6.0/gems/cheffish-14.0.4/lib/openssl.rb", O_RDONLY|O_NONBLOCK|O_CLOEXEC) = -1 ENOENT (No such file or directory) 
 open("/opt/chef/embedded/lib/ruby/gems/2.6.0/gems/coderay-1.1.2/lib/openssl.rb", O_RDONLY|O_NONBLOCK|O_CLOEXEC) = -1 ENOENT (No such file or directory) 
 open("/opt/chef/embedded/lib/ruby/gems/2.6.0/gems/safe_yaml-1.0.5/lib/openssl.rb", O_RDONLY|O_NONBLOCK|O_CLOEXEC) = -1 ENOENT (No such file or directory) 
 open("/opt/chef/embedded/lib/ruby/gems/2.6.0/gems/crack-0.4.3/lib/openssl.rb", O_RDONLY|O_NONBLOCK|O_CLOEXEC) = -1 ENOENT (No such file or directory) 
 open("/opt/chef/embedded/lib/ruby/gems/2.6.0/gems/docile-1.3.1/lib/openssl.rb", O_RDONLY|O_NONBLOCK|O_CLOEXEC) = -1 ENOENT (No such file or directory) 
 open("/opt/chef/embedded/lib/ruby/gems/2.6.0/gems/multipart-post-2.0.0/lib/openssl.rb", O_RDONLY|O_NONBLOCK|O_CLOEXEC) = -1 ENOENT (No such file or directory) 
 open("/opt/chef/embedded/lib/ruby/gems/2.6.0/gems/faraday-0.15.4/lib/openssl.rb", O_RDONLY|O_NONBLOCK|O_CLOEXEC) = -1 ENOENT (No such file or directory) 
 open("/opt/chef/embedded/lib/ruby/gems/2.6.0/gems/faraday_middleware-0.12.2/lib/openssl.rb", O_RDONLY|O_NONBLOCK|O_CLOEXEC) = -1 ENOENT (No such file or directory) 
 open("/opt/chef/embedded/lib/ruby/gems/2.6.0/gems/hashdiff-0.3.9/lib/openssl.rb", O_RDONLY|O_NONBLOCK|O_CLOEXEC) = -1 ENOENT (No such file or directory) 
 open("/opt/chef/embedded/lib/ruby/gems/2.6.0/gems/htmlentities-4.3.4/lib/openssl.rb", O_RDONLY|O_NONBLOCK|O_CLOEXEC) = -1 ENOENT (No such file or directory) 
 open("/opt/chef/embedded/lib/ruby/gems/2.6.0/gems/thor-0.20.3/lib/openssl.rb", O_RDONLY|O_NONBLOCK|O_CLOEXEC) = -1 ENOENT (No such file or directory) 
 open("/opt/chef/embedded/lib/ruby/gems/2.6.0/gems/method_source-0.9.2/lib/openssl.rb", O_RDONLY|O_NONBLOCK|O_CLOEXEC) = -1 ENOENT (No such file or directory) 
 open("/opt/chef/embedded/lib/ruby/gems/2.6.0/gems/rspec-support-3.8.0/lib/openssl.rb", O_RDONLY|O_NONBLOCK|O_CLOEXEC) = -1 ENOENT (No such file or directory) 
 open("/opt/chef/embedded/lib/ruby/gems/2.6.0/gems/rspec-core-3.8.0/lib/openssl.rb", O_RDONLY|O_NONBLOCK|O_CLOEXEC) = -1 ENOENT (No such file or directory) 
 open("/opt/chef/embedded/lib/ruby/gems/2.6.0/gems/rspec-expectations-3.8.3/lib/openssl.rb", O_RDONLY|O_NONBLOCK|O_CLOEXEC) = -1 ENOENT (No such file or directory) 
 open("/opt/chef/embedded/lib/ruby/gems/2.6.0/gems/rspec-mocks-3.8.0/lib/openssl.rb", O_RDONLY|O_NONBLOCK|O_CLOEXEC) = -1 ENOENT (No such file or directory) 
 open("/opt/chef/embedded/lib/ruby/gems/2.6.0/gems/rspec-3.8.0/lib/openssl.rb", O_RDONLY|O_NONBLOCK|O_CLOEXEC) = -1 ENOENT (No such file or directory) 
 open("/opt/chef/embedded/lib/ruby/gems/2.6.0/gems/rspec-its-1.3.0/lib/openssl.rb", O_RDONLY|O_NONBLOCK|O_CLOEXEC) = -1 ENOENT (No such file or directory) 
 open("/opt/chef/embedded/lib/ruby/gems/2.6.0/gems/pry-0.12.2/lib/openssl.rb", O_RDONLY|O_NONBLOCK|O_CLOEXEC) = -1 ENOENT (No such file or directory) 
 open("/opt/chef/embedded/lib/ruby/gems/2.6.0/gems/sslshake-1.3.0/lib/openssl.rb", O_RDONLY|O_NONBLOCK|O_CLOEXEC) = -1 ENOENT (No such file or directory) 
 open("/opt/chef/embedded/lib/ruby/gems/2.6.0/gems/parallel-1.17.0/lib/openssl.rb", O_RDONLY|O_NONBLOCK|O_CLOEXEC) = -1 ENOENT (No such file or directory) 
 open("/opt/chef/embedded/lib/ruby/gems/2.6.0/gems/parslet-1.8.2/lib/openssl.rb", O_RDONLY|O_NONBLOCK|O_CLOEXEC) = -1 ENOENT (No such file or directory) 
 open("/opt/chef/embedded/lib/ruby/gems/2.6.0/gems/semverse-3.0.0/lib/openssl.rb", O_RDONLY|O_NONBLOCK|O_CLOEXEC) = -1 ENOENT (No such file or directory) 
 open("/opt/chef/embedded/lib/ruby/gems/2.6.0/gems/tty-table-0.10.0/lib/openssl.rb", O_RDONLY|O_NONBLOCK|O_CLOEXEC) = -1 ENOENT (No such file or directory) 
 open("/opt/chef/embedded/lib/ruby/gems/2.6.0/gems/tins-1.20.2/lib/openssl.rb", O_RDONLY|O_NONBLOCK|O_CLOEXEC) = -1 ENOENT (No such file or directory) 
 open("/opt/chef/embedded/lib/ruby/gems/2.6.0/gems/term-ansicolor-1.7.1/lib/openssl.rb", O_RDONLY|O_NONBLOCK|O_CLOEXEC) = -1 ENOENT (No such file or directory) 
 open("/opt/chef/embedded/lib/ruby/gems/2.6.0/gems/inspec-core-4.3.2/lib/openssl.rb", O_RDONLY|O_NONBLOCK|O_CLOEXEC) = -1 ENOENT (No such file or directory) 
 open("/opt/chef/embedded/lib/ruby/gems/2.6.0/gems/json-2.2.0/lib/openssl.rb", O_RDONLY|O_NONBLOCK|O_CLOEXEC) = -1 ENOENT (No such file or directory) 
 open("/opt/chef/embedded/lib/ruby/gems/2.6.0/extensions/x86_64-linux/2.6.0/json-2.2.0/openssl.rb", O_RDONLY|O_NONBLOCK|O_CLOEXEC) = -1 ENOENT (No such file or directory) 
 open("/opt/chef/embedded/lib/ruby/gems/2.6.0/gems/pry-byebug-3.7.0/lib/openssl.rb", O_RDONLY|O_NONBLOCK|O_CLOEXEC) = -1 ENOENT (No such file or directory) 
 open("/opt/chef/embedded/lib/ruby/gems/2.6.0/gems/slop-3.6.0/lib/openssl.rb", O_RDONLY|O_NONBLOCK|O_CLOEXEC) = -1 ENOENT (No such file or directory) 
 open("/opt/chef/embedded/lib/ruby/gems/2.6.0/gems/pry-remote-0.1.8/lib/openssl.rb", O_RDONLY|O_NONBLOCK|O_CLOEXEC) = -1 ENOENT (No such file or directory) 
 open("/opt/chef/embedded/lib/ruby/gems/2.6.0/gems/pry-stack_explorer-0.4.9.3/lib/openssl.rb", O_RDONLY|O_NONBLOCK|O_CLOEXEC) = -1 ENOENT (No such file or directory) 
 open("/opt/chef/embedded/lib/ruby/gems/2.6.0/gems/rake-12.3.2/lib/openssl.rb", O_RDONLY|O_NONBLOCK|O_CLOEXEC) = -1 ENOENT (No such file or directory) 
 open("/opt/chef/embedded/lib/ruby/gems/2.6.0/gems/rb-readline-0.5.5/lib/openssl.rb", O_RDONLY|O_NONBLOCK|O_CLOEXEC) = -1 ENOENT (No such file or directory) 
 open("/opt/chef/embedded/lib/ruby/gems/2.6.0/gems/rspec_junit_formatter-0.2.3/lib/openssl.rb", O_RDONLY|O_NONBLOCK|O_CLOEXEC) = -1 ENOENT (No such file or directory) 
 open("/opt/chef/embedded/lib/ruby/gems/2.6.0/gems/ruby-prof-0.17.0/lib/openssl.rb", O_RDONLY|O_NONBLOCK|O_CLOEXEC) = -1 ENOENT (No such file or directory) 
 open("/opt/chef/embedded/lib/ruby/gems/2.6.0/extensions/x86_64-linux/2.6.0/ruby-prof-0.17.0/openssl.rb", O_RDONLY|O_NONBLOCK|O_CLOEXEC) = -1 ENOENT (No such file or directory) 
 open("/opt/chef/embedded/lib/ruby/gems/2.6.0/gems/ruby-shadow-2.5.0/lib/openssl.rb", O_RDONLY|O_NONBLOCK|O_CLOEXEC) = -1 ENOENT (No such file or directory) 
 open("/opt/chef/embedded/lib/ruby/gems/2.6.0/extensions/x86_64-linux/2.6.0/ruby-shadow-2.5.0/openssl.rb", O_RDONLY|O_NONBLOCK|O_CLOEXEC) = -1 ENOENT (No such file or directory) 
 open("/opt/chef/embedded/lib/ruby/gems/2.6.0/gems/simplecov-html-0.10.2/lib/openssl.rb", O_RDONLY|O_NONBLOCK|O_CLOEXEC) = -1 ENOENT (No such file or directory) 
 open("/opt/chef/embedded/lib/ruby/gems/2.6.0/gems/simplecov-0.16.1/lib/openssl.rb", O_RDONLY|O_NONBLOCK|O_CLOEXEC) = -1 ENOENT (No such file or directory) 
 open("/opt/chef/embedded/lib/ruby/gems/2.6.0/gems/webmock-3.5.1/lib/openssl.rb", O_RDONLY|O_NONBLOCK|O_CLOEXEC) = -1 ENOENT (No such file or directory) 
 open("/opt/chef/embedded/lib/ruby/gems/2.6.0/gems/bundler-1.17.3/lib/openssl.rb", O_RDONLY|O_NONBLOCK|O_CLOEXEC) = -1 ENOENT (No such file or directory) 
 open("/opt/chef/embedded/lib/ruby/site_ruby/2.6.0/openssl.rb", O_RDONLY|O_NONBLOCK|O_CLOEXEC) = -1 ENOENT (No such file or directory) 
 open("/opt/chef/embedded/lib/ruby/site_ruby/2.6.0/x86_64-linux/openssl.rb", O_RDONLY|O_NONBLOCK|O_CLOEXEC) = -1 ENOENT (No such file or directory) 
 open("/opt/chef/embedded/lib/ruby/site_ruby/openssl.rb", O_RDONLY|O_NONBLOCK|O_CLOEXEC) = -1 ENOENT (No such file or directory) 
 open("/opt/chef/embedded/lib/ruby/vendor_ruby/2.6.0/openssl.rb", O_RDONLY|O_NONBLOCK|O_CLOEXEC) = -1 ENOENT (No such file or directory) 
 open("/opt/chef/embedded/lib/ruby/vendor_ruby/2.6.0/x86_64-linux/openssl.rb", O_RDONLY|O_NONBLOCK|O_CLOEXEC) = -1 ENOENT (No such file or directory) 
 open("/opt/chef/embedded/lib/ruby/vendor_ruby/openssl.rb", O_RDONLY|O_NONBLOCK|O_CLOEXEC) = -1 ENOENT (No such file or directory) 
 open("/opt/chef/embedded/lib/ruby/2.6.0/openssl.rb", O_RDONLY|O_NONBLOCK|O_CLOEXEC) = 7 
 ``` 

 On windows, taking this much I/O on every single `require` line require line, can quickly add up to 100,000s of open calls, which takes several seconds on an SSD or up to and can take upwards of a minute on a spinning drive just to evaluate the requires of an application that does no work (i.e. command line tooling).

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