https://github.com/python/cpython/commit/bdf0fece5bbc2fc9fffbf0f314c7022e24e747df
commit: bdf0fece5bbc2fc9fffbf0f314c7022e24e747df
branch: 3.8
author: Miss Islington (bot) <31488909+miss-islington@users.noreply.github.com>
committer: terryjreedy <tjreedy@udel.edu>
date: 2021-02-23T20:47:06-05:00
summary:
bpo-43283: Add IDLE doc paragraph about print speed (GH-24615) (GH-24632)
Printing to IDLE's Shell is often slower than printing to a system
terminal, but it can be made faster by pre-formatting a single
string before printing.
(cherry picked from commit 2827e8a177c2a6584fada594bca6829c53a2872f)
Co-authored-by: Terry Jan Reedy <tjreedy@udel.edu>
files:
A Misc/NEWS.d/next/IDLE/2021-02-21-16-30-10.bpo-43283.DLBwYn.rst
M Doc/library/idle.rst
M Lib/idlelib/NEWS.txt
M Lib/idlelib/help.html
diff --git a/Doc/library/idle.rst b/Doc/library/idle.rst
index fc45e3161bc6d..2b9bd4b5daaa7 100644
--- a/Doc/library/idle.rst
+++ b/Doc/library/idle.rst
@@ -726,6 +726,15 @@ with objects that get input from and send output to the Shell window.
The original values stored in ``sys.__stdin__``, ``sys.__stdout__``, and
``sys.__stderr__`` are not touched, but may be ``None``.
+Sending print output from one process to a text widget in another is
+slower than printing to a system terminal in the same process.
+This has the most effect when printing multiple arguments, as the string
+for each argument, each separator, the newline are sent separately.
+For development, this is usually not a problem, but if one wants to
+print faster in IDLE, format and join together everything one wants
+displayed together and then print a single string. Both format strings
+and :meth:`str.join` can help combine fields and lines.
+
IDLE's standard stream replacements are not inherited by subprocesses
created in the execution process, whether directly by user code or by
modules such as multiprocessing. If such subprocess use ``input`` from
diff --git a/Lib/idlelib/NEWS.txt b/Lib/idlelib/NEWS.txt
index cf80b9efe2389..103bf971232a6 100644
--- a/Lib/idlelib/NEWS.txt
+++ b/Lib/idlelib/NEWS.txt
@@ -3,6 +3,10 @@ Released on 2021-02-15?
======================================
+bpo-43283: Document why printing to IDLE's Shell is often slower than
+printing to a system terminal and that it can be made faster by
+pre-formatting a single string before printing.
+
bpo-23544: Disable Debug=>Stack Viewer when user code is running or
Debugger is active, to prevent hang or crash. Patch by Zackery Spytz.
diff --git a/Lib/idlelib/help.html b/Lib/idlelib/help.html
index 1eefa506e2c8d..924042d25b7ba 100644
--- a/Lib/idlelib/help.html
+++ b/Lib/idlelib/help.html
@@ -679,6 +679,14 @@ <h3>Running user code<a class="headerlink" href="#running-user-code" title="Perm
with objects that get input from and send output to the Shell window.
The original values stored in <code class="docutils literal notranslate"><span class="pre">sys.__stdin__</span></code>, <code class="docutils literal notranslate"><span class="pre">sys.__stdout__</span></code>, and
<code class="docutils literal notranslate"><span class="pre">sys.__stderr__</span></code> are not touched, but may be <code class="docutils literal notranslate"><span class="pre">None</span></code>.</p>
+<p>Sending print output from one process to a text widget in another is
+slower than printing to a system terminal in the same process.
+This has the most effect when printing multiple arguments, as the string
+for each argument, each separator, the newline are sent separately.
+For development, this is usually not a problem, but if one wants to
+print faster in IDLE, format and join together everything one wants
+displayed together and then print a single string. Both format strings
+and <a class="reference internal" href="stdtypes.html#str.join" title="str.join"><code class="xref py py-meth docutils literal notranslate"><span class="pre">str.join()</span></code></a> can help combine fields and lines.</p>
<p>IDLE’s standard stream replacements are not inherited by subprocesses
created in the execution process, whether directly by user code or by
modules such as multiprocessing. If such subprocess use <code class="docutils literal notranslate"><span class="pre">input</span></code> from
@@ -982,7 +990,7 @@ <h3>Navigation</h3>
<br />
<br />
- Last updated on Feb 21, 2021.
+ Last updated on Feb 23, 2021.
<a href="https://docs.python.org/3/bugs.html">Found a bug</a>?
<br />
diff --git a/Misc/NEWS.d/next/IDLE/2021-02-21-16-30-10.bpo-43283.DLBwYn.rst b/Misc/NEWS.d/next/IDLE/2021-02-21-16-30-10.bpo-43283.DLBwYn.rst
new file mode 100644
index 0000000000000..7a627af412a8e
--- /dev/null
+++ b/Misc/NEWS.d/next/IDLE/2021-02-21-16-30-10.bpo-43283.DLBwYn.rst
@@ -0,0 +1,3 @@
+Document why printing to IDLE's Shell is often slower than printing to a
+system terminal and that it can be made faster by pre-formatting a single
+string before printing.
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Python-checkins@python.org
https://mail.python.org/mailman/listinfo/python-checkins
commit: bdf0fece5bbc2fc9fffbf0f314c7022e24e747df
branch: 3.8
author: Miss Islington (bot) <31488909+miss-islington@users.noreply.github.com>
committer: terryjreedy <tjreedy@udel.edu>
date: 2021-02-23T20:47:06-05:00
summary:
bpo-43283: Add IDLE doc paragraph about print speed (GH-24615) (GH-24632)
Printing to IDLE's Shell is often slower than printing to a system
terminal, but it can be made faster by pre-formatting a single
string before printing.
(cherry picked from commit 2827e8a177c2a6584fada594bca6829c53a2872f)
Co-authored-by: Terry Jan Reedy <tjreedy@udel.edu>
files:
A Misc/NEWS.d/next/IDLE/2021-02-21-16-30-10.bpo-43283.DLBwYn.rst
M Doc/library/idle.rst
M Lib/idlelib/NEWS.txt
M Lib/idlelib/help.html
diff --git a/Doc/library/idle.rst b/Doc/library/idle.rst
index fc45e3161bc6d..2b9bd4b5daaa7 100644
--- a/Doc/library/idle.rst
+++ b/Doc/library/idle.rst
@@ -726,6 +726,15 @@ with objects that get input from and send output to the Shell window.
The original values stored in ``sys.__stdin__``, ``sys.__stdout__``, and
``sys.__stderr__`` are not touched, but may be ``None``.
+Sending print output from one process to a text widget in another is
+slower than printing to a system terminal in the same process.
+This has the most effect when printing multiple arguments, as the string
+for each argument, each separator, the newline are sent separately.
+For development, this is usually not a problem, but if one wants to
+print faster in IDLE, format and join together everything one wants
+displayed together and then print a single string. Both format strings
+and :meth:`str.join` can help combine fields and lines.
+
IDLE's standard stream replacements are not inherited by subprocesses
created in the execution process, whether directly by user code or by
modules such as multiprocessing. If such subprocess use ``input`` from
diff --git a/Lib/idlelib/NEWS.txt b/Lib/idlelib/NEWS.txt
index cf80b9efe2389..103bf971232a6 100644
--- a/Lib/idlelib/NEWS.txt
+++ b/Lib/idlelib/NEWS.txt
@@ -3,6 +3,10 @@ Released on 2021-02-15?
======================================
+bpo-43283: Document why printing to IDLE's Shell is often slower than
+printing to a system terminal and that it can be made faster by
+pre-formatting a single string before printing.
+
bpo-23544: Disable Debug=>Stack Viewer when user code is running or
Debugger is active, to prevent hang or crash. Patch by Zackery Spytz.
diff --git a/Lib/idlelib/help.html b/Lib/idlelib/help.html
index 1eefa506e2c8d..924042d25b7ba 100644
--- a/Lib/idlelib/help.html
+++ b/Lib/idlelib/help.html
@@ -679,6 +679,14 @@ <h3>Running user code<a class="headerlink" href="#running-user-code" title="Perm
with objects that get input from and send output to the Shell window.
The original values stored in <code class="docutils literal notranslate"><span class="pre">sys.__stdin__</span></code>, <code class="docutils literal notranslate"><span class="pre">sys.__stdout__</span></code>, and
<code class="docutils literal notranslate"><span class="pre">sys.__stderr__</span></code> are not touched, but may be <code class="docutils literal notranslate"><span class="pre">None</span></code>.</p>
+<p>Sending print output from one process to a text widget in another is
+slower than printing to a system terminal in the same process.
+This has the most effect when printing multiple arguments, as the string
+for each argument, each separator, the newline are sent separately.
+For development, this is usually not a problem, but if one wants to
+print faster in IDLE, format and join together everything one wants
+displayed together and then print a single string. Both format strings
+and <a class="reference internal" href="stdtypes.html#str.join" title="str.join"><code class="xref py py-meth docutils literal notranslate"><span class="pre">str.join()</span></code></a> can help combine fields and lines.</p>
<p>IDLE’s standard stream replacements are not inherited by subprocesses
created in the execution process, whether directly by user code or by
modules such as multiprocessing. If such subprocess use <code class="docutils literal notranslate"><span class="pre">input</span></code> from
@@ -982,7 +990,7 @@ <h3>Navigation</h3>
<br />
<br />
- Last updated on Feb 21, 2021.
+ Last updated on Feb 23, 2021.
<a href="https://docs.python.org/3/bugs.html">Found a bug</a>?
<br />
diff --git a/Misc/NEWS.d/next/IDLE/2021-02-21-16-30-10.bpo-43283.DLBwYn.rst b/Misc/NEWS.d/next/IDLE/2021-02-21-16-30-10.bpo-43283.DLBwYn.rst
new file mode 100644
index 0000000000000..7a627af412a8e
--- /dev/null
+++ b/Misc/NEWS.d/next/IDLE/2021-02-21-16-30-10.bpo-43283.DLBwYn.rst
@@ -0,0 +1,3 @@
+Document why printing to IDLE's Shell is often slower than printing to a
+system terminal and that it can be made faster by pre-formatting a single
+string before printing.
_______________________________________________
Python-checkins mailing list
Python-checkins@python.org
https://mail.python.org/mailman/listinfo/python-checkins