##// END OF EJS Templates
revlog: change generaldelta delta parent heuristic...
revlog: change generaldelta delta parent heuristic The old generaldelta heuristic was "if p1 (or p2) was closer than the last full text, use it, otherwise use prev". This was problematic when a repo contained multiple branches that were very different. If commits to branch A were pushed, and the last full text was branch B, it would generate a fulltext. Then if branch B was pushed, it would generate another fulltext. The problem is that the last fulltext (and delta'ing against `prev` in general) has no correlation with the contents of the incoming revision, and therefore will always have degenerate cases. According to the blame, that algorithm was chosen to minimize the chain length. Since there is already code that protects against that (the delta-vs-fulltext code), and since it has been improved since the original generaldelta algorithm went in (2011), I believe the chain length criteria will still be preserved. The new algorithm always diffs against p1 (or p2 if it's closer), unless the resulting delta will fail the delta-vs-fulltext check, in which case we delta against prev. Some before and after stats on manifest.d size. internal large repo old heuristic - 2.0 GB new heuristic - 1.2 GB mozilla-central old heuristic - 242 MB new heuristic - 261 MB The regression in mozilla central is due to the new heuristic choosing p2r as the delta when it's closer to the tip. Switching the algorithm to always prefer p1r brings the size back down (242 MB). This is result of the way in which mozilla does merges and pushes, and the result could easily swing the other direction in other repos (depending on if they merge X into Y or Y into X), but will never be as degenerate as before. I future patch will address the regression by introducing an optional, even more aggressive delta heuristic which will knock the mozilla manifest size down dramatically.

File last commit:

r5081:ea7b982b default
r26117:4dc5b51f default
Show More
hg-menu.vim
93 lines | 3.5 KiB | text/x-vim | VimLexer
" vim600: set foldmethod=marker:
" =============================================================================
" Name Of File: hg-menu.vim
" Description: Interface to Mercurial Version Control.
" Author: Steve Borho (modified Jeff Lanzarotta's RCS script)
" Date: Wednesday, October 5, 2005
" Version: 0.1.0
" Copyright: None.
" Usage: These command and gui menu displays useful hg functions
" Configuration: Your hg executable must be in your path.
" =============================================================================
" Section: Init {{{1
if exists("loaded_hg_menu")
finish
endif
let loaded_hg_menu = 1
" Section: Menu Options {{{1
if has("gui")
" amenu H&G.Commit\ File<Tab>,ci :!hg commit %<CR>:e!<CR>
" amenu H&G.Commit\ All<Tab>,call :!hg commit<CR>:e!<CR>
" amenu H&G.-SEP1- <nul>
amenu H&G.Add<Tab>\\add :!hg add %<CR><CR>
amenu H&G.Forget\ Add<Tab>\\fgt :!hg forget %<CR><CR>
amenu H&G.Show\ Differences<Tab>\\diff :call ShowResults("FileDiff", "hg\ diff")<CR><CR>
amenu H&G.Revert\ to\ Last\ Version<Tab>\\revert :!hg revert %<CR>:e!<CR>
amenu H&G.Show\ History<Tab>\\log :call ShowResults("FileLog", "hg\ log")<CR><CR>
amenu H&G.Annotate<Tab>\\an :call ShowResults("annotate", "hg\ annotate")<CR><CR>
amenu H&G.-SEP1- <nul>
amenu H&G.Repo\ Status<Tab>\\stat :call ShowResults("RepoStatus", "hg\ status")<CR><CR>
amenu H&G.Pull<Tab>\\pull :!hg pull<CR>:e!<CR>
amenu H&G.Update<Tab>\\upd :!hg update<CR>:e!<CR>
endif
" Section: Mappings {{{1
if(v:version >= 600)
" The default Leader is \ 'backslash'
map <Leader>add :!hg add %<CR><CR>
map <Leader>fgt :!hg forget %<CR><CR>
map <Leader>diff :call ShowResults("FileDiff", "hg\ diff")<CR><CR>
map <Leader>revert :!hg revert %<CR>:e!<CR>
map <Leader>log :call ShowResults("FileLog", "hg\ log")<CR><CR>
map <Leader>an :call ShowResults("annotate", "hg\ annotate")<CR><CR>
map <Leader>stat :call ShowResults("RepoStatus", "hg\ status")<CR><CR>
map <Leader>upd :!hg update<CR>:e!<CR>
map <Leader>pull :!hg pull<CR>:e!<CR>
else
" pre 6.0, the default Leader was a comma
map ,add :!hg add %<CR><CR>
map ,fgt :!hg forget %<CR><CR>
map ,diff :call ShowResults("FileDiff", "hg\ diff")<CR><CR>
map ,revert :!hg revert<CR>:e!<CR>
map ,log :call ShowResults("FileLog", "hg\ log")<CR><CR>
map ,an :call ShowResults("annotate", "hg\ annotate")<CR><CR>
map ,stat :call ShowResults("RepoStatus", "hg\ status")<CR><CR>
map ,upd :!hg update<CR>:e!<CR>
map ,pull :!hg pull<CR>:e!<CR>
endif
" Section: Functions {{{1
" Show the log results of the current file with a revision control system.
function! ShowResults(bufferName, cmdName)
" Modify the shortmess option:
" A don't give the "ATTENTION" message when an existing swap file is
" found.
set shortmess+=A
" Get the name of the current buffer.
let currentBuffer = bufname("%")
" If a buffer with the name rlog exists, delete it.
if bufexists(a:bufferName)
execute 'bd! ' a:bufferName
endif
" Create a new buffer.
execute 'new ' a:bufferName
" Execute the command.
execute 'r!' a:cmdName ' ' currentBuffer
" Make is so that the file can't be edited.
setlocal nomodified
setlocal nomodifiable
setlocal readonly
" Go to the beginning of the buffer.
execute "normal 1G"
" Restore the shortmess option.
set shortmess-=A
endfunction