window.print taking longer in Ubuntu

[nicolasgarfinkiel]

Issue Type

• Bug Report
• Successfully reproduced against the latest version of NW.js?

Current/Missing Behavior

Consider the following code:

nw.Window.open('https://www.google.com', {}, (win) => {
    chrome.developerPrivate.openDevTools({
        renderViewId: -1,
        renderProcessId: -1,
        extensionId: chrome.runtime.id
    });
    // win.showDevTools();
    setTimeout(() => {
        const startTime = performance.now();
        console.log(`start print`);
        win.print({
            pdf_path: `/tmp/${new Date().getTime()}.pdf`,
            silent: true,
            shouldPrintBackgrounds: false,
            marginsType: 1,
        });
        console.log(`end print, took: ${performance.now() - startTime}`);
    }, 5000);
});

In macOs, console.log outputs:

start print
main.js:21 end print, took: 959.3999999985099

In Ubuntu 22.04, console.log outputs:

start print
main.js:17 end print, took: 7450.599999999977

More complex pages take even longer. During the print time, the window becomes unresponsive. Also, when doing a non-silent print, the time it takes to preview the print is considerably long in Ubuntu with respect to macOS.

Expected/Proposed Behavior

NW.js should print equally fast in both Ubuntu and macOS

Additional Info

• Operating System: Ubuntu 22.04 / macOS Monterrey
• NW.js Version: 0.67.1

[nicolasgarfinkiel]

Hello guys, any comments on this issue: it's a bit pressing for us and we can even discuss a bounty. Thanks.