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perf: don't use JSON to send the result of ipcRenderer.sendSync. (#8953)

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* Don't use JSON to send the result of `ipcRenderer.sendSync`.

- Change the return type of AtomViewHostMsg_Message_Sync from `base::string16`
  to `base::ListValue`
- Adjust lib/browser/api/web-contents.js and /lib/renderer/api/ipc-renderer.js
  to wrap/unwrap return values to/from array, instead of
  serializing/deserializing JSON.

This change can greatly improve `ipcRenderer.sendSync` calls where the return
value contains Buffer instances, because those are converted to Array before
being serialized to JSON(which has no efficient way of representing byte
arrays).

A simple benchmark where remote.require('fs') was used to read a 16mb file got
at least 5x faster, not to mention it used a lot less memory.  This difference
tends increases with larger buffers.

* Don't base64 encode Buffers

* Don't allocate V8ValueConverter on the heap

* Replace hidden global.sandbox with NodeBindings::IsInitialized()

* Refactoring: check NodeBindings::IsInitialized() in V8ValueConverter

* Refactor problematic test to make it more reliable

* Add tests for NaN and Infinity
This commit is contained in:
Thiago de Arruda 2018-06-13 04:38:31 -03:00 • committed by Samuel Attard
parent fa1a5f2a42
commit 6ff111a141
17 changed files with 82 additions and 64 deletions
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15
atom/renderer/api/atom_api_renderer_ipc.cc
View file

@ -6,6 +6,7 @@
#include "atom/common/api/api_messages.h"
#include "atom/common/native_mate_converters/string16_converter.h"
#include "atom/common/native_mate_converters/value_converter.h"
#include "atom/common/node_bindings.h"
#include "atom/common/node_includes.h"
#include "content/public/renderer/render_frame.h"
#include "native_mate/dictionary.h"
@ -40,23 +41,23 @@ void Send(mate::Arguments* args,
args->ThrowError("Unable to send AtomFrameHostMsg_Message");
}
base::string16 SendSync(mate::Arguments* args,
const base::string16& channel,
const base::ListValue& arguments) {
base::string16 json;
base::ListValue SendSync(mate::Arguments* args,
const base::string16& channel,
const base::ListValue& arguments) {
base::ListValue result;
RenderFrame* render_frame = GetCurrentRenderFrame();
if (render_frame == nullptr)
return json;
return result;
IPC::SyncMessage* message = new AtomFrameHostMsg_Message_Sync(
render_frame->GetRoutingID(), channel, arguments, &json);
render_frame->GetRoutingID(), channel, arguments, &result);
bool success = render_frame->Send(message);
if (!success)
args->ThrowError("Unable to send AtomFrameHostMsg_Message_Sync");
return json;
return result;
}
void Initialize(v8::Local<v8::Object> exports,