workLoopConcurrent

タイマー付きworkLoop.

Scheduler外部でもYieldタイミング判定を行っている。

概略コード

code:js

function workLoopConcurrent() {

let workInProgress = undefined;

// Perform work until Scheduler asks us to yield

while (workInProgress !== null && !shouldYield()) {

workInProgress = performUnitOfWork(workInProgress);

}

}

code:js

function workLoopConcurrent() {

// Perform work until Scheduler asks us to yield

while (workInProgress !== null && !shouldYield()) {

performUnitOfWork(workInProgress);

}

}

function performUnitOfWork(unitOfWork: Fiber): void {

// The current, flushed, state of this fiber is the alternate. Ideally

// nothing should rely on this, but relying on it here means that we don't

// need an additional field on the work in progress.

const current = unitOfWork.alternate;

setCurrentDebugFiberInDEV(unitOfWork);

let next;

if (enableProfilerTimer && (unitOfWork.mode & ProfileMode) !== NoMode) {

startProfilerTimer(unitOfWork);

next = beginWork(current, unitOfWork, subtreeRenderLanes);

stopProfilerTimerIfRunningAndRecordDelta(unitOfWork, true);

} else {

next = beginWork(current, unitOfWork, subtreeRenderLanes);

}

resetCurrentDebugFiberInDEV();

unitOfWork.memoizedProps = unitOfWork.pendingProps;

if (next === null) {

// If this doesn't spawn new work, complete the current work.

completeUnitOfWork(unitOfWork);

} else {

workInProgress = next;

}

ReactCurrentOwner.current = null;

}