【 在 tkfeng2000 (Tian) 的大作中提到: 】
: release模式下还行， 1ms左右

这么牛，怎么做到的？
我更新一个表格，同Release下，居然要近1s，不知如何提速呢。
笔记本电脑，CPU Intel Core i5-4210U @ 1.70 GHz 2.40 GHz，内存 4 GB
代码如下，请Qt高手指点。

void ResultForm::updateTable(int tableIndex) {
   QElapsedTimer tm;
    tm.start();

    QTableWidget* table = tables.at(tableIndex);
    table->horizontalHeader()->setSectionResizeMode(QHeaderView::Fixed);
    table->verticalHeader()->setSectionResizeMode(QHeaderView::Fixed);

    table->setRowCount(0);
    //    table->clearContents();
    //    table->setColumnCount(headers.size());
    disconnect(table, &QTableWidget::cellChanged, 0, 0);

    QString strDateFmt("yyyy-MM-dd hh:mm:ss");
    QMap<qint64, Val*> vals = mapVals[tableIndex];
    QList<qint64> ids = vals.keys();

    for(int i = 0, j = 0; i < ids.size(); i++, j = 0) {
        table->insertRow(i);
        Val *val = mapVals[ids.at(i)];
        QTableWidgetItem* item = new QTableWidgetItem();
        item->setData(Qt::DisplayRole, table->rowCount());
        item->setStatusTip(QString::number(val->getValId()));
        Qt::ItemFlags readOnlyFlag = item->flags() & (~Qt::ItemIsEditable);
        item->setFlags(readOnlyFlag);
        table->setItem(i, j++, item);

        item = new QTableWidgetItem(val->getDrawName());
        item->setFlags(readOnlyFlag);
        item->setItem(i, j++, item);

        item = new QTableWidgetItem(val->getValTag());
        item->setFlags(readOnlyFlag);
        table->setItem(i, j++, item);

        item = new QTableWidgetItem(val->getSampleTag());
        item->setFlags(readOnlyFlag);
        table->setItem(i, j++, item);

        item = new QTableWidgetItem(val->getResult());
        item->setFlags(readOnlyFlag);
        table->setItem(i, j++, item);

        …… // 总共10列。

        for(int c = 1; c < j ; c++) {
            table->item(i, c)->setTextAlignment(Qt::AlignCenter);
        }
    }

    connect(table, &QTableWidget::cellChanged, this, &ResultForm::changeCell
);

    //    table->horizontalHeader()->setSectionResizeMode(QHeaderView::Resiz
eToContents);
    //    table->verticalHeader()->setSectionResizeMode(QHeaderView::ResizeT
oContents);

    qint64 t = tm.restart();
    qDebug() << "updateTable()" << table->rowCount() << " rows, time" << t;
}


[2021-03-07 22:26:10.301][Debug] updateTable() 676  rows, time 817
--
修改:callmebbser FROM 59.61.12.*
FROM 58.23.58.*