commit | 6380bed94bf45e9b6ba24bb41c6d0927412f8a6f | [log] [tgz] |
---|---|---|
author | Mike Frysinger <vapier@chromium.org> | Thu Aug 24 22:46:39 2017 |
committer | Mike Frysinger <vapier@chromium.org> | Sat Aug 26 04:59:10 2017 |
tree | 60a3bb0f87cf29fa6d311af5d4da73c2dbcc0853 | |
parent | a27c050c5b5050a11f16c3e52d92d60afdbf1af1 [diff] |
hterm: avoid recalculating string display widths when possible There's a number of locations where we calculate a string's display width, pass the string to another function, and then that function also calculates the display width. Since wcwidth has to iterate over every codepoint every time, this can be fairly wasteful. So when we've already know the display width ahead of time, pass the result around. This covers the main loops in the hterm display code. Using Chrome's built in profiling, lib.wc.* funcs go from the top of the profile (hottest funcs) to the 3rd hottest and lower. That means rendering of lots of text (ASCII & UTF-8) should get a decent boost. Change-Id: I906c745b6e35d1990eebdc8436c0bce3a3ab8f4d Reviewed-on: https://chromium-review.googlesource.com/634161 Reviewed-by: Brandon Gilmore <varz@google.com> Tested-by: Mike Frysinger <vapier@chromium.org>
This repository contains the libdot JavaScript library and some web applications that make use of it.
The official copy of this repository is hosted at https://chromium.googlesource.com/apps/libapps.
There is also a mirror on github at https://github.com/libapps/libapps-mirror. Keep in mind that this mirror may occasionally be behind the official repository.
All changes must go through the Gerrit code review server on https://chromium-review.googlesource.com. Github pull requests cannot be accepted. Please see the HACK.md document in this directory for the details.
libdot/ is a small set of JS libraries initially developed as part of hterm, now available as shared code. It provides a base layer for web applications. The code is intended to work in any modern browser, in either a plain web page or a “privileged” environment such as a Chrome platform application or Firefox extension. In practice, it's only been put to use in Chrome platform applications so far.
hterm/ is a JS library that provides a terminal emulator. It is reasonably fast, reasonably correct, and reasonably portable across browsers.
nassh/ is the Secure Shell Chrome App (currently a “v1.5” app, soon to become a “v2” or platform app) that combines hterm with a NaCl build of OpenSSH to provide a PuTTY-like app for Chrome users.
ssh_client/ is the NaCl port of OpenSSH. It is used by nassh to create the Secure Shell App.
wash/ is a library for cross-origin virtual filesystems, similar to the Plan 9 filesystem. This directory also contains a simple bash-like shell environment for exploring these filesystems. The code in this directory is a work-in-progress.