diff --git a/README.md b/README.md
index 9dbd744..856b953 100644
--- a/README.md
+++ b/README.md
@@ -8,60 +8,65 @@
 
 1. Setup [Vundle]:
 
-     ```
-     $ git clone http://github.com/gmarik/vundle.git ~/.vim/bundle/vundle
-     ```
+    ```
+    $ git clone http://github.com/gmarik/vundle.git ~/.vim/bundle/vundle
+    ```
 
 2. Configure bundles:
 
-     Sample `.vimrc`:
-
-     ```vim
-     set nocompatible               " be iMproved
-     filetype off                   " required!
-
-     set rtp+=~/.vim/bundle/vundle/
-     call vundle#rc()
-
-     " let Vundle manage Vundle
-     " required! 
-     Bundle 'gmarik/vundle'
-
-     " My Bundles here:
-     "
-     " original repos on github
-     Bundle 'tpope/vim-fugitive'
-     Bundle 'Lokaltog/vim-easymotion'
-     Bundle 'rstacruz/sparkup', {'rtp': 'vim/'}
-     " vim-scripts repos
-     Bundle 'L9'
-     Bundle 'FuzzyFinder'
-     Bundle 'rails.vim'
-     " non github repos
-     Bundle 'git://git.wincent.com/command-t.git'
-     " ...
-
-     filetype plugin indent on     " required! 
-     "
-     " Brief help
-     " :BundleList          - list configured bundles
-     " :BundleInstall(!)    - install(update) bundles
-     " :BundleSearch(!) foo - search(or refresh cache first) for foo
-     " :BundleClean(!)      - confirm(or auto-approve) removal of unused bundles
-     "
-     " see :h vundle for more details or wiki for FAQ
-     " NOTE: comments after Bundle command are not allowed..
-
-     ```
+    Sample `.vimrc`:
+
+    ```vim
+    set nocompatible               " be iMproved
+    filetype off                   " required!
+
+    set rtp+=~/.vim/bundle/vundle/
+    call vundle#rc()
+
+    " let Vundle manage Vundle
+    " required!
+    Bundle 'gmarik/vundle'
+
+    " My Bundles here:
+    "
+    " original repos on github
+    Bundle 'tpope/vim-fugitive'
+    Bundle 'Lokaltog/vim-easymotion'
+    Bundle 'rstacruz/sparkup', {'rtp': 'vim/'}
+    " vim-scripts repos
+    Bundle 'L9'
+    Bundle 'FuzzyFinder'
+    Bundle 'rails.vim'
+    " non github repos
+    Bundle 'git://git.wincent.com/command-t.git'
+    " ...
+
+    " Slow scripts which will not be bound and loaded at Vim startup.
+    " When needed, you can manually bind them via `BundleBind!` command,
+    " run `:help Bundle-option-bind` and `:help BundleBind!` for more details.
+    Bundle 'c.vim', {'bind': 0, 'tags': ['c']}
+
+    filetype plugin indent on     " required!
+    "
+    " Brief help
+    " :BundleList          - list configured bundles
+    " :BundleInstall(!)    - install(update) bundles
+    " :BundleSearch(!) foo - search(or refresh cache first) for foo
+    " :BundleClean(!)      - confirm(or auto-approve) removal of unused bundles
+    "
+    " see :h vundle for more details or wiki for FAQ
+    " NOTE: comments after Bundle command are not allowed..
+
+    ```
 
 3. Install configured bundles:
 
-     Launch `vim`, run `:BundleInstall`. 
+     Launch `vim`, run `:BundleInstall`.
 
      *Windows users* see [Vundle for Windows](https://github.com/gmarik/vundle/wiki/Vundle-for-Windows)
 
      Installing requires [Git] and triggers [Git clone](http://gitref.org/creating/#clone) for each configured repo to `~/.vim/bundle/`.
-     
+
 4. Consider donating
 
 [![](https://www.paypalobjects.com/en_US/i/btn/btn_donateCC_LG.gif)](https://www.paypal.com/cgi-bin/webscr?cmd=_s-xclick&hosted_button_id=T44EJZX8RBUWY)
@@ -74,7 +79,7 @@
 [Vundle] allows to:
 
 - keep track and configure your scripts right in `.vimrc`
-- [install] configured scripts (aka bundle) 
+- [install] configured scripts (aka bundle)
 - [update] configured scripts
 - [search] by name [all available vim scripts]
 - [clean] unused scripts up
diff --git a/autoload/vundle.vim b/autoload/vundle.vim
index 632a5b2..ca44829 100644
--- a/autoload/vundle.vim
+++ b/autoload/vundle.vim
@@ -7,6 +7,9 @@
 com! -nargs=+         Bundle
 \ call vundle#config#bundle(<args>)
 
+com! -nargs=* -bang BundleBind
+\ call vundle#config#bind(<f-args>)
+
 com! -nargs=? -bang -complete=custom,vundle#scripts#complete BundleInstall
 \ call vundle#installer#new('!' == '<bang>', <q-args>)
 
diff --git a/autoload/vundle/config.vim b/autoload/vundle/config.vim
index e8443c1..1831d2f 100644
--- a/autoload/vundle/config.vim
+++ b/autoload/vundle/config.vim
@@ -1,30 +1,41 @@
 func! vundle#config#bundle(arg, ...)
   let bundle = vundle#config#init_bundle(a:arg, a:000)
-  call s:rtp_rm_a()
   call add(g:bundles, bundle)
-  call s:rtp_add_a()
+endf
+
+func! vundle#config#bind(...)
+  if a:0 == 0
+    call s:rtp_rm(g:bundles)
+    let bind_bundles = filter(copy(g:bundles), 'v:val.bind')
+    call vundle#config#require(bind_bundles)
+  else
+    let matched_bundles = filter(copy(g:bundles),
+          \ 's:is_tags_matched(v:val, '.string(a:000).')')
+    call vundle#config#require(matched_bundles)
+  end
 endf
 
 func! vundle#config#init()
-  if !exists('g:bundles') | let g:bundles = [] | endif
-  call s:rtp_rm_a()
+  if exists('g:bundles')
+    call s:rtp_rm(g:bundles)
+  endif
   let g:bundles = []
 endf
 
 func! vundle#config#require(bundles) abort
-  for b in a:bundles
-    call s:rtp_add(b.rtpath())
-    call s:rtp_add(g:bundle_dir)
-    " TODO: it has to be relative rtpath, not bundle.name
-    exec 'runtime! '.b.name.'/plugin/*.vim'
-    exec 'runtime! '.b.name.'/after/*.vim'
-    call s:rtp_rm(g:bundle_dir)
-  endfor
+  call s:rtp_add(a:bundles)
+  " It's OK to do this since every plugin prevent itself be loaded twice
+  runtime! plugin/*.vim
+  runtime! after/*.vim
 endf
 
 func! vundle#config#init_bundle(name, opts)
   let opts = extend(s:parse_options(a:opts), s:parse_name(substitute(a:name,"['".'"]\+','','g')))
-  return extend(opts, copy(s:bundle))
+  let bundle = extend(copy(s:bundle), opts)
+
+  let bundle.escaped_rtpath = fnameescape(expand(bundle.rtpath()))
+  let bundle.escaped_rtpath_after = fnameescape(expand(bundle.rtpath().'/after'))
+  return bundle
 endf
 
 func! s:parse_options(opts)
@@ -60,29 +71,42 @@ func! s:parse_name(arg)
   return {'name': name, 'uri': uri, 'name_spec': arg }
 endf
 
-func! s:rtp_rm_a()
-  call filter(copy(g:bundles), 's:rtp_rm(v:val.rtpath())')
+func! s:rtp_rm(bundles) abort
+  for bundle in a:bundles
+    exec 'set rtp-='.bundle.escaped_rtpath
+    exec 'set rtp-='.bundle.escaped_rtpath_after
+  endfor
 endf
 
-func! s:rtp_add_a()
-  call filter(reverse(copy(g:bundles)), 's:rtp_add(v:val.rtpath())')
+func! s:rtp_add(bundles) abort
+  for bundle in reverse(copy(a:bundles))
+    exec 'set rtp^='.bundle.escaped_rtpath
+    exec 'set rtp+='.bundle.escaped_rtpath_after
+  endfor
 endf
 
-func! s:rtp_rm(dir) abort
-  exec 'set rtp-='.fnameescape(expand(a:dir))
-  exec 'set rtp-='.fnameescape(expand(a:dir.'/after'))
-endf
+func! s:is_tags_matched(bundle, tags)
+  if !has_key(a:bundle, 'tags')
+    return 0
+  endif
+
+  let is_matched = 0
+  for tag in a:bundle.tags
+     let is_matched = index(a:tags, tag) != -1
+
+     if is_matched
+       break
+     endif
+  endfor
 
-func! s:rtp_add(dir) abort
-  exec 'set rtp^='.fnameescape(expand(a:dir))
-  exec 'set rtp+='.fnameescape(expand(a:dir.'/after'))
+  return is_matched
 endf
 
 func! s:expand_path(path) abort
   return simplify(expand(a:path))
 endf
 
-let s:bundle = {}
+let s:bundle = {'bind': 1}
 
 func! s:bundle.path()
   return s:expand_path(g:bundle_dir.'/'.self.name)
diff --git a/doc/vundle.txt b/doc/vundle.txt
index 3b347ce..8e2c6ee 100644
--- a/doc/vundle.txt
+++ b/doc/vundle.txt
@@ -28,7 +28,7 @@ Vundle is a short cut for Vim bundle and is the Vim plug-in manager.
 Vundle allows to:
 
 - keep track and configure your scripts right in `.vimrc`
-- install configured scripts (aka bundle) 
+- install configured scripts (aka bundle)
 - update configured scripts
 - search [all available vim scripts] by name
 - clean up from unused scripts
@@ -38,7 +38,7 @@ Also *Vundle* :
 - manages runtime path of your installed scripts
 - regenerates helptags automatically
 
-Vundle takes advantage of [vim-scripts.org](http://vim-scripts.org) 
+Vundle takes advantage of [vim-scripts.org](http://vim-scripts.org)
 in order to install/search [all available vim scripts]
 
 3. QUICK START ~
@@ -51,32 +51,38 @@ in order to install/search [all available vim scripts]
 
    Sample `.vimrc`: >
 
-     set nocompatible               " be iMproved
-     filetype off                   " required!
-
-     set rtp+=~/.vim/vundle.git/ 
-     call vundle#rc()
-
-     " let Vundle manage Vundle
-     Bundle 'gmarik/vundle'
-
-     " My Bundles here:
-     "
-     " original repos on github
-     Bundle 'tpope/vim-fugitive'
-     Bundle 'Lokaltog/vim-easymotion'
-     Bundle 'rstacruz/sparkup', {'rtp': 'vim/'}
-     " vim-scripts repos
-     Bundle 'L9'
-     Bundle 'FuzzyFinder'
-     Bundle 'rails.vim'
-     " non github repos
-     Bundle 'git://git.wincent.com/command-t.git'
-     " ...
-
-     filetype plugin indent on     " required!
-     " or 
-     " filetype plugin on          " to not use the indentation settings set by plugins
+    set nocompatible               " be iMproved
+    filetype off                   " required!
+
+    set rtp+=~/.vim/vundle.git/
+    call vundle#rc()
+
+    " let Vundle manage Vundle
+    Bundle 'gmarik/vundle'
+
+    " My Bundles here:
+    "
+    " original repos on github
+    Bundle 'tpope/vim-fugitive'
+    Bundle 'Lokaltog/vim-easymotion'
+    Bundle 'rstacruz/sparkup', {'rtp': 'vim/'}
+    " vim-scripts repos
+    Bundle 'L9'
+    Bundle 'FuzzyFinder'
+    Bundle 'rails.vim'
+    " non github repos
+    Bundle 'git://git.wincent.com/command-t.git'
+    " ...
+
+    " Slow scripts which will not be bound and loaded at Vim startup.
+    " When needed, you can manually bind them via `BundleBind!` command,
+    " run `:help |Bundle-option-bind|` and `:help |BundleBind!|` for more
+    " details.
+    Bundle 'c.vim', {'bind': 0, 'tags': ['c']}
+
+    filetype plugin indent on     " required!
+    " or
+    " filetype plugin on          " to not use the indentation settings set by plugins
 
 3) Install configured bundles:
 
@@ -84,7 +90,7 @@ in order to install/search [all available vim scripts]
 
     :BundleInstall
 
-Installing requires [Git] and triggers [Git clone](http://gitref.org/creating/#clone) for 
+Installing requires [Git] and triggers [Git clone](http://gitref.org/creating/#clone) for
 each configured repo to `~/.vim/bundle/`.
 
 4. SCRIPTS ~
@@ -94,7 +100,7 @@ each configured repo to `~/.vim/bundle/`.
 Before installing scripts they need to be configured. It's done using `Bundle`
 command in `.vimrc`: >
 
-    Bundle 'git_repo_uri'       " 'git_repo_uri' should be a valid uri to git repository 
+    Bundle 'git_repo_uri'       " 'git_repo_uri' should be a valid uri to git repository
 or >
     Bundle 'script_name'        " 'script-name' should be an official script name (see |vundle-scripts-search| )
 
@@ -108,6 +114,42 @@ equals full uri >
 
 NOTE: Vundle defaults to http:// protocol for the short URIs
 
+                                                            *Bundle-option-bind*
+If some of your scripts will slow down your Vim startup, and you don't really
+often need them, you have an option to disable bind them at Vim startup: >
+
+    Bundle 'c.vim', {'bind': 0}
+
+When you need, these scripts can be bound manually via |BundleBind!| command.
+
+                                                            *Bundle-option-tags*
+Scripts can be grouped via tags option: >
+
+    Bundle 'c.vim', {'tags', ['c', 'slow']}
+    Bundle 'bash-support.vim', {'tags', ['bash', 'slow']}
+
+Currently the only usage of tags is to allow you manually bind slow scripts
+when needed, but group scripts by tags should be useful in the future.
+
+                                                            *BundleBind!*
+`Bundle` command just tell Vundle which scripts you want to use, it doesn't
+tell Vim load them, i.e, it doesn't update the 'runtimepath' option of Vim.
+
+To tell Vim load your scripts, `BundleBind!` must be executed. But Vundle will
+do it automatically, so usually you don't need to do it yourself.
+
+The benefit of use an extra command to update 'runtimepath' is, we can make
+Vim startup much faster while keeping 'runtimepath' ordered according to the
+bundles declarations.
+
+You can run `BundleBind!` manually to bind and load those scripts which
+haven't get bound and loaded at Vim startup: >
+
+    :BundleBind! slow
+
+`BundleBind!` can accept any number of tags, just use space to separate them:
+>
+    :BundleBind! c bash ruby javascript
 
 4.2 INSTALL SCRIPTS ~
                                       *vundle-scripts-install* *BundleInstall*
@@ -122,7 +164,7 @@ BundleInstall allows to install scripts by name:>
     :BundleInstall unite.vim
 
 installs and activates unite.vim. You can use Tab to auto-complete known script names.
-NOTE: installation, as just described, doesn't automatically configure scripts; 
+NOTE: installation, as just described, doesn't automatically configure scripts;
 you have to configure them manually.
 
 4.3 UPDATE SCRIPTS ~
@@ -170,11 +212,11 @@ run >
 
     :BundleClean
 
-requires confirmation before removal of unused script-dirs from your `.vim/bundle`. 
+requires confirmation before removal of unused script-dirs from your `.vim/bundle`.
 
                                                             *BundleClean!*
 >
-    :BundleClean! 
+    :BundleClean!
 
 removes unused scripts with no questions.
 
@@ -201,8 +243,8 @@ content: >
     Bundle 'unite-colorscheme'
 
 As the first line(starting with `"Keymap:`) shows, certain actions may be applied
-to selected bundles .  Move cursor over line `Bundle 'unite.vim'` and press i 
-key(install, see |vundle-keymappings| for more details). 
+to selected bundles .  Move cursor over line `Bundle 'unite.vim'` and press i
+key(install, see |vundle-keymappings| for more details).
 After unite.vim is installed - `:Unite file` command should be
 available to prove 'unite.vim' availability.
 
diff --git a/plugin/vundle.vim b/plugin/vundle.vim
new file mode 100644
index 0000000..dc19532
--- /dev/null
+++ b/plugin/vundle.vim
@@ -0,0 +1,7 @@
+if exists('g:loaded_vundle') || &cp
+  finish
+endif
+let g:loaded_vundle = 1
+
+" Bind and load all scripts bundles immediately.
+BundleBind!