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HTML minification function, django middleware, decorator

Project description


Django HTML minification middleware (another one). Key feature - speed. Up to 60x time faster, than htmlmin. Compress html, removes comments, respects (dont remove) conditional comments (IE) by default.


For install django-hmin, run on terminal:

$ pip install django-hmin

Extra install options

If you want extraspeed, you can install re2 (very fast regular expressions) library (pip install re2 + reqs). Hmin will use it instead of re.

Using the midleware

All you need to do is add two middlewares to your MIDDLEWARE_CLASSES:

    # other middleware classes

If you’re using Django’s caching middleware, MarkMiddleware should go after FetchFromCacheMiddleware, and MinMiddleware should go after UpdateCacheMiddleware:

  # other middleware classes

You can optionally specify the HTML_MINIFY setting:


The default value for the HTML_MINIFY setting is not DEBUG. You only need to set it to True if you want to minify your HTML code when DEBUG is enabled.

URL exclude

Specify setting:

HMIN_EXCLUDE = ('^base/', '^admin/')

Keep html comments

Specify settings:


Using the function

Just import function minify: from hmin import minify, than you can use it with any html you want. Definition of minify function: def minify(content, remove_comments=True)

Using the decorator

Just import decorator minify_plain: from hmin.decorators import minify_plain, than you can minify any function you want:

def my_cool_func():
    return some_plain_html

Or, if you want to keep html comments:

def my_cool_func():
    return some_plain_html

About speed

I try to compress 1mb of html (i think, your usual html is slightly thiner) on my i7 laptop processor and measure time with django-debug-toolbar.

Django overhead took about 40ms (all), this is time without minification, just plain html, django, etc.

Then i install hmin and htmlmin and just look at the debug toolbar numbers (this is very silly and simple “benchmark”): - with hmin cpu was about 60ms (min) - with htmlmin cpu was about 1200ms (min)

Minus overhead, plain time: hmin - 20ms, htmlmin - 1160ms.

Probably, you can get other numbers. But hmin really faster than htmlmin.


Who cares? Use it whatever you want.

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