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体验新版 GitCode,发现更多精彩内容 >>
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b8a9da5a
编写于
5月 18, 2018
作者:
D
Daniel Imms
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电子邮件补丁
差异文件
Improve when dom renderer notification is displayed
Fixes #50130
上级
28e770f4
变更
1
隐藏空白更改
内联
并排
Showing
1 changed file
with
20 addition
and
8 deletion
+20
-8
src/vs/workbench/parts/terminal/electron-browser/terminalInstance.ts
...bench/parts/terminal/electron-browser/terminalInstance.ts
+20
-8
未找到文件。
src/vs/workbench/parts/terminal/electron-browser/terminalInstance.ts
浏览文件 @
b8a9da5a
...
...
@@ -37,7 +37,8 @@ import { IStorageService, StorageScope } from 'vs/platform/storage/common/storag
// How long in milliseconds should an average frame take to render for a notification to appear
// which suggests the fallback DOM-based renderer
const
SLOW_CANVAS_RENDER_THRESHOLD
=
100
;
const
SLOW_CANVAS_RENDER_THRESHOLD
=
50
;
const
NUMBER_OF_FRAMES_TO_MEASURE
=
20
;
let
Terminal
:
typeof
XTermTerminal
;
...
...
@@ -436,13 +437,16 @@ export class TerminalInstance implements ITerminalInstance {
}
private
_measureRenderTime
():
void
{
let
frameTimes
:
number
[]
=
[];
const
textRenderLayer
=
(
<
any
>
this
.
_xterm
).
renderer
.
_renderLayers
[
0
];
const
originalOnGridChanged
=
textRenderLayer
.
onGridChanged
;
textRenderLayer
.
onGridChanged
=
(
terminal
:
XTermTerminal
,
firstRow
:
number
,
lastRow
:
number
)
=>
{
const
startTime
=
performance
.
now
();
originalOnGridChanged
.
call
(
textRenderLayer
,
terminal
,
firstRow
,
lastRow
);
const
renderTimeMilliseconds
=
performance
.
now
()
-
startTime
;
if
(
renderTimeMilliseconds
>
SLOW_CANVAS_RENDER_THRESHOLD
)
{
const
evaluateCanvasRenderer
=
()
=>
{
// Discard first frame time as it's normal to take longer
frameTimes
.
shift
();
const
averageTime
=
frameTimes
.
reduce
((
p
,
c
)
=>
p
+
c
)
/
frameTimes
.
length
;
if
(
averageTime
>
SLOW_CANVAS_RENDER_THRESHOLD
)
{
const
promptChoices
:
IPromptChoice
[]
=
[
{
label
:
nls
.
localize
(
'
yes
'
,
"
Yes
"
),
...
...
@@ -468,9 +472,17 @@ export class TerminalInstance implements ITerminalInstance {
promptChoices
);
}
};
// Restore original function
textRenderLayer
.
onGridChanged
=
originalOnGridChanged
;
textRenderLayer
.
onGridChanged
=
(
terminal
:
XTermTerminal
,
firstRow
:
number
,
lastRow
:
number
)
=>
{
const
startTime
=
performance
.
now
();
originalOnGridChanged
.
call
(
textRenderLayer
,
terminal
,
firstRow
,
lastRow
);
frameTimes
.
push
(
performance
.
now
()
-
startTime
);
if
(
frameTimes
.
length
===
NUMBER_OF_FRAMES_TO_MEASURE
)
{
evaluateCanvasRenderer
();
// Restore original function
textRenderLayer
.
onGridChanged
=
originalOnGridChanged
;
}
};
}
...
...
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