Mercurial > hg
view mercurial/templatefilters.py @ 30212:260af19891f2
changegroup: increase write buffer size to 128k
By default, Python defers to the operating system for choosing the
default buffer size on opened files. On my Linux machine, the default
is 4k, which is really small for 2016.
This patch bumps the write buffer size when writing
changegroups/bundles to 128k. This matches the 128k read buffer
we already use on revlogs.
It's worth noting that this only impacts when writing to an explicit
file (such as during `hg bundle`). Buffers when writing to bundle
files via the repo vfs or to a temporary file are not impacted.
When producing a none-v2 bundle file of the mozilla-unified repository,
this change caused the number of write() system calls to drop from
952,449 to 29,788. After this change, the most frequent system
calls are fstat(), read(), lseek(), and open(). There were
2,523,672 system calls after this patch (so a net decrease of
~950k is statistically significant).
This change shows no performance change on my system. But I have a
high-end system with a fast SSD. It is quite possible this change
will have a significant impact on network file systems, where
extra network round trips due to excessive I/O system calls could
introduce significant latency.
author | Gregory Szorc <gregory.szorc@gmail.com> |
---|---|
date | Sun, 16 Oct 2016 13:35:23 -0700 |
parents | 032c4c2f802a |
children | 53865692a354 |
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# template-filters.py - common template expansion filters # # Copyright 2005-2008 Matt Mackall <mpm@selenic.com> # # This software may be used and distributed according to the terms of the # GNU General Public License version 2 or any later version. from __future__ import absolute_import import cgi import os import re import time from . import ( encoding, hbisect, node, registrar, templatekw, util, ) urlerr = util.urlerr urlreq = util.urlreq # filters are callables like: # fn(obj) # with: # obj - object to be filtered (text, date, list and so on) filters = {} templatefilter = registrar.templatefilter(filters) @templatefilter('addbreaks') def addbreaks(text): """Any text. Add an XHTML "<br />" tag before the end of every line except the last. """ return text.replace('\n', '<br/>\n') agescales = [("year", 3600 * 24 * 365, 'Y'), ("month", 3600 * 24 * 30, 'M'), ("week", 3600 * 24 * 7, 'W'), ("day", 3600 * 24, 'd'), ("hour", 3600, 'h'), ("minute", 60, 'm'), ("second", 1, 's')] @templatefilter('age') def age(date, abbrev=False): """Date. Returns a human-readable date/time difference between the given date/time and the current date/time. """ def plural(t, c): if c == 1: return t return t + "s" def fmt(t, c, a): if abbrev: return "%d%s" % (c, a) return "%d %s" % (c, plural(t, c)) now = time.time() then = date[0] future = False if then > now: future = True delta = max(1, int(then - now)) if delta > agescales[0][1] * 30: return 'in the distant future' else: delta = max(1, int(now - then)) if delta > agescales[0][1] * 2: return util.shortdate(date) for t, s, a in agescales: n = delta // s if n >= 2 or s == 1: if future: return '%s from now' % fmt(t, n, a) return '%s ago' % fmt(t, n, a) @templatefilter('basename') def basename(path): """Any text. Treats the text as a path, and returns the last component of the path after splitting by the path separator (ignoring trailing separators). For example, "foo/bar/baz" becomes "baz" and "foo/bar//" becomes "bar". """ return os.path.basename(path) @templatefilter('count') def count(i): """List or text. Returns the length as an integer.""" return len(i) @templatefilter('domain') def domain(author): """Any text. Finds the first string that looks like an email address, and extracts just the domain component. Example: ``User <user@example.com>`` becomes ``example.com``. """ f = author.find('@') if f == -1: return '' author = author[f + 1:] f = author.find('>') if f >= 0: author = author[:f] return author @templatefilter('email') def email(text): """Any text. Extracts the first string that looks like an email address. Example: ``User <user@example.com>`` becomes ``user@example.com``. """ return util.email(text) @templatefilter('escape') def escape(text): """Any text. Replaces the special XML/XHTML characters "&", "<" and ">" with XML entities, and filters out NUL characters. """ return cgi.escape(text.replace('\0', ''), True) para_re = None space_re = None def fill(text, width, initindent='', hangindent=''): '''fill many paragraphs with optional indentation.''' global para_re, space_re if para_re is None: para_re = re.compile('(\n\n|\n\\s*[-*]\\s*)', re.M) space_re = re.compile(r' +') def findparas(): start = 0 while True: m = para_re.search(text, start) if not m: uctext = unicode(text[start:], encoding.encoding) w = len(uctext) while 0 < w and uctext[w - 1].isspace(): w -= 1 yield (uctext[:w].encode(encoding.encoding), uctext[w:].encode(encoding.encoding)) break yield text[start:m.start(0)], m.group(1) start = m.end(1) return "".join([util.wrap(space_re.sub(' ', util.wrap(para, width)), width, initindent, hangindent) + rest for para, rest in findparas()]) @templatefilter('fill68') def fill68(text): """Any text. Wraps the text to fit in 68 columns.""" return fill(text, 68) @templatefilter('fill76') def fill76(text): """Any text. Wraps the text to fit in 76 columns.""" return fill(text, 76) @templatefilter('firstline') def firstline(text): """Any text. Returns the first line of text.""" try: return text.splitlines(True)[0].rstrip('\r\n') except IndexError: return '' @templatefilter('hex') def hexfilter(text): """Any text. Convert a binary Mercurial node identifier into its long hexadecimal representation. """ return node.hex(text) @templatefilter('hgdate') def hgdate(text): """Date. Returns the date as a pair of numbers: "1157407993 25200" (Unix timestamp, timezone offset). """ return "%d %d" % text @templatefilter('isodate') def isodate(text): """Date. Returns the date in ISO 8601 format: "2009-08-18 13:00 +0200". """ return util.datestr(text, '%Y-%m-%d %H:%M %1%2') @templatefilter('isodatesec') def isodatesec(text): """Date. Returns the date in ISO 8601 format, including seconds: "2009-08-18 13:00:13 +0200". See also the rfc3339date filter. """ return util.datestr(text, '%Y-%m-%d %H:%M:%S %1%2') def indent(text, prefix): '''indent each non-empty line of text after first with prefix.''' lines = text.splitlines() num_lines = len(lines) endswithnewline = text[-1:] == '\n' def indenter(): for i in xrange(num_lines): l = lines[i] if i and l.strip(): yield prefix yield l if i < num_lines - 1 or endswithnewline: yield '\n' return "".join(indenter()) @templatefilter('json') def json(obj): if obj is None or obj is False or obj is True: return {None: 'null', False: 'false', True: 'true'}[obj] elif isinstance(obj, int) or isinstance(obj, float): return str(obj) elif isinstance(obj, str): return '"%s"' % encoding.jsonescape(obj, paranoid=True) elif util.safehasattr(obj, 'keys'): out = [] for k, v in sorted(obj.iteritems()): s = '%s: %s' % (json(k), json(v)) out.append(s) return '{' + ', '.join(out) + '}' elif util.safehasattr(obj, '__iter__'): out = [] for i in obj: out.append(json(i)) return '[' + ', '.join(out) + ']' elif util.safehasattr(obj, '__call__'): return json(obj()) else: raise TypeError('cannot encode type %s' % obj.__class__.__name__) @templatefilter('lower') def lower(text): """Any text. Converts the text to lowercase.""" return encoding.lower(text) @templatefilter('nonempty') def nonempty(str): """Any text. Returns '(none)' if the string is empty.""" return str or "(none)" @templatefilter('obfuscate') def obfuscate(text): """Any text. Returns the input text rendered as a sequence of XML entities. """ text = unicode(text, encoding.encoding, 'replace') return ''.join(['&#%d;' % ord(c) for c in text]) @templatefilter('permissions') def permissions(flags): if "l" in flags: return "lrwxrwxrwx" if "x" in flags: return "-rwxr-xr-x" return "-rw-r--r--" @templatefilter('person') def person(author): """Any text. Returns the name before an email address, interpreting it as per RFC 5322. >>> person('foo@bar') 'foo' >>> person('Foo Bar <foo@bar>') 'Foo Bar' >>> person('"Foo Bar" <foo@bar>') 'Foo Bar' >>> person('"Foo \"buz\" Bar" <foo@bar>') 'Foo "buz" Bar' >>> # The following are invalid, but do exist in real-life ... >>> person('Foo "buz" Bar <foo@bar>') 'Foo "buz" Bar' >>> person('"Foo Bar <foo@bar>') 'Foo Bar' """ if '@' not in author: return author f = author.find('<') if f != -1: return author[:f].strip(' "').replace('\\"', '"') f = author.find('@') return author[:f].replace('.', ' ') @templatefilter('revescape') def revescape(text): """Any text. Escapes all "special" characters, except @. Forward slashes are escaped twice to prevent web servers from prematurely unescaping them. For example, "@foo bar/baz" becomes "@foo%20bar%252Fbaz". """ return urlreq.quote(text, safe='/@').replace('/', '%252F') @templatefilter('rfc3339date') def rfc3339date(text): """Date. Returns a date using the Internet date format specified in RFC 3339: "2009-08-18T13:00:13+02:00". """ return util.datestr(text, "%Y-%m-%dT%H:%M:%S%1:%2") @templatefilter('rfc822date') def rfc822date(text): """Date. Returns a date using the same format used in email headers: "Tue, 18 Aug 2009 13:00:13 +0200". """ return util.datestr(text, "%a, %d %b %Y %H:%M:%S %1%2") @templatefilter('short') def short(text): """Changeset hash. Returns the short form of a changeset hash, i.e. a 12 hexadecimal digit string. """ return text[:12] @templatefilter('shortbisect') def shortbisect(text): """Any text. Treats `text` as a bisection status, and returns a single-character representing the status (G: good, B: bad, S: skipped, U: untested, I: ignored). Returns single space if `text` is not a valid bisection status. """ return hbisect.shortlabel(text) or ' ' @templatefilter('shortdate') def shortdate(text): """Date. Returns a date like "2006-09-18".""" return util.shortdate(text) @templatefilter('splitlines') def splitlines(text): """Any text. Split text into a list of lines.""" return templatekw.showlist('line', text.splitlines(), 'lines') @templatefilter('stringescape') def stringescape(text): return text.encode('string_escape') @templatefilter('stringify') def stringify(thing): """Any type. Turns the value into text by converting values into text and concatenating them. """ if util.safehasattr(thing, '__iter__') and not isinstance(thing, str): return "".join([stringify(t) for t in thing if t is not None]) if thing is None: return "" return str(thing) @templatefilter('stripdir') def stripdir(text): """Treat the text as path and strip a directory level, if possible. For example, "foo" and "foo/bar" becomes "foo". """ dir = os.path.dirname(text) if dir == "": return os.path.basename(text) else: return dir @templatefilter('tabindent') def tabindent(text): """Any text. Returns the text, with every non-empty line except the first starting with a tab character. """ return indent(text, '\t') @templatefilter('upper') def upper(text): """Any text. Converts the text to uppercase.""" return encoding.upper(text) @templatefilter('urlescape') def urlescape(text): """Any text. Escapes all "special" characters. For example, "foo bar" becomes "foo%20bar". """ return urlreq.quote(text) @templatefilter('user') def userfilter(text): """Any text. Returns a short representation of a user name or email address.""" return util.shortuser(text) @templatefilter('emailuser') def emailuser(text): """Any text. Returns the user portion of an email address.""" return util.emailuser(text) @templatefilter('utf8') def utf8(text): """Any text. Converts from the local character encoding to UTF-8.""" return encoding.fromlocal(text) @templatefilter('xmlescape') def xmlescape(text): text = (text .replace('&', '&') .replace('<', '<') .replace('>', '>') .replace('"', '"') .replace("'", ''')) # ' invalid in HTML return re.sub('[\x00-\x08\x0B\x0C\x0E-\x1F]', ' ', text) def websub(text, websubtable): """:websub: Any text. Only applies to hgweb. Applies the regular expression replacements defined in the websub section. """ if websubtable: for regexp, format in websubtable: text = regexp.sub(format, text) return text def loadfilter(ui, extname, registrarobj): """Load template filter from specified registrarobj """ for name, func in registrarobj._table.iteritems(): filters[name] = func # tell hggettext to extract docstrings from these functions: i18nfunctions = filters.values()