Slow PHP file load time due to performance of EnablePHPFolds

[mmikitka]

I have been profiling the Vim start-up time of PHP files on my computer, and observed that the EnablePHPFolds function in PIV is a major contributor.

I am loading a 4600-line file, and it takes about 2.5 seconds to complete 4 invocations of EnablePHPFolds (I have not inspected the code to determine why 4 invocations is required). The loaded file is from the Drupal 7.22 release: drupal/includes/form.inc.

To access the file:

1. Download at https://drupal.org/download
2. Unpack tgz
3. Access drupal/includes/form.inc

Here are the relevant computer specs:

OS: Ubuntu 12.04
Hardware: Core i7, 8GB RAM
PHP indent: /usr/share/vim/vim73/indent/php.vim
Loaded file:

I ran the following command to generate the profile data

vim --cmd 'profile start profile.log' --cmd 'profile func *' --cmd 'profile file home/mmikitka/.vim/bundle/PIV/*' -c 'profdel func *' -c 'profdel file *' -c 'qa!' form.inc

Here is the profile output:

FUNCTIONS SORTED ON TOTAL TIME
count total (s) self (s) function
4 3.392811 0.000026 91_EnableFastPHPFolds()
4 3.392785 2.515609 91_EnablePHPFolds()
3 2.349923 0.006236 23_LoadFTPlugin()
1 1.091110 0.000003 InitDrupalFile()
1 1.057983 0.000008 91_CheckAutocmdEnablePHPFold()
8 0.877176 0.000440 91_PHPCustomFolds()
16 0.829981 0.026336 91_PHPFoldPureBlock()
968 0.426004 91_FindPureBlockEnd()
1 0.261470 0.000043 6_FTinc()
1000 0.179377 91_FindOptionalPHPDocComment()
984 0.173407 91_FindPureBlockStart()
3 0.093296 0.004204 4_SynSet()
1 0.069849 0.000190 GitGutter()
64 0.042520 0.001242 vundle#config#bundle()
88 0.040567 91_FindPatternStart()
40 0.034428 0.002700 91_PHPFoldProperties()
1 0.032176 0.000041 65_is_active()
1000 0.027254 91_HandleFold()
1 0.026152 0.000096 65_init()
1 0.025809 0.000057 65_define_signs()

FUNCTIONS SORTED ON SELF TIME
count total (s) self (s) function
4 3.392785 2.515609 91_EnablePHPFolds()
968 0.426004 91_FindPureBlockEnd()
1000 0.179377 91_FindOptionalPHPDocComment()
984 0.173407 91_FindPureBlockStart()
88 0.040567 91_FindPatternStart()
1000 0.027254 91_HandleFold()
16 0.829981 0.026336 91_PHPFoldPureBlock()
1 0.025703 65_define_sign_line_highlights()
1 0.024453 0.021004 59_Highlights()
64 0.017420 10_rtp_add_a()
66 0.016938 10_rtp_rm_a()
3 2.349923 0.006236 23_LoadFTPlugin()
50 0.006221 0.006001 67()
3 0.093296 0.004204 4_SynSet()
64 0.003139 10_parse_name()
40 0.034428 0.002700 91_PHPFoldProperties()
64 0.007060 0.002390 vundle#config#init_bundle()
18 0.001947 81_CreateMaps()
2 0.001835 0.001797 ctrlp#utils#writecache()
8 0.001648 PHPFoldText()