https://github.com/0f-0b figured this out for both Deno and Node.js https://github.com/denoland/deno/discussions/17236.
On Sun, Jan 1, 2023 at 4:24 AM <v8-users@googlegroups.com> wrote: > v8-users@googlegroups.com > <https://groups.google.com/forum/?utm_source=digest&utm_medium=email#!forum/v8-users/topics> > Google > Groups > <https://groups.google.com/forum/?utm_source=digest&utm_medium=email/#!overview> > <https://groups.google.com/forum/?utm_source=digest&utm_medium=email/#!overview> > Topic digest > View all topics > <https://groups.google.com/forum/?utm_source=digest&utm_medium=email#!forum/v8-users/topics> > > - Any recent changes that impact buffering or caching procceses? > <#m_2400262473293151249_group_thread_0> - 3 Updates > > Any recent changes that impact buffering or caching procceses? > <http://groups.google.com/group/v8-users/t/b113624bd3c605af?utm_source=digest&utm_medium=email> > guest271314 <guest271...@gmail.com>: Dec 31 12:11PM -0800 > > I created Native Messaging hosts in several programming languages > including > C, C++, JavaScript. In JavaScript I created a host specific to QuickJS, > Node.js, Deno. Node.js and Deno depend on V8. I use the same call in the > extension to create hosts > > globalThis.name = chrome.runtime.getManifest().short_name; > > globalThis.port = chrome.runtime.connectNative(globalThis.name); > port.onMessage.addListener((message) => console.log(message)); > port.onDisconnect.addListener((p) => > console.log(chrome.runtime.lastError)); > port.postMessage(new Array(200000)); > > chrome.runtime.onInstalled.addListener((reason) => { > console.log(reason); > }); > > The same code used to work on Chromium Dev Channel. Now the V8 JavaScript > engine-specific versions increase memory usage exponentially to upwards of > 1GB, then exit. > > The input is echoed when the input array is 2000. > > Appears to be some kind of caching or process blocking. I am not sure > though. > > Any recent changes that impact buffering or caching procceses? > guest271314 <guest271...@gmail.com>: Dec 31 02:35PM -0800 > > Appears to be a memory leak in Node.js and Deno when input to stdin > (and/or > stdout) is greater than 4096*3. node executable memory usage climbs to > 700MB+ then exits when input is new Array(4096*4). > > Are there any V8 flags I can use to work around this? > > On Saturday, December 31, 2022 at 12:11:16 PM UTC-8 guest271314 wrote: > > guest271314 <guest271...@gmail.com>: Dec 31 07:31PM -0800 > > After more testing I narrow the input to stdin length for memory to > increase pointing to Node.js and Deno executables to when I call this in > the browser > port.postMessage(new Array((4096*3)+818)); > > 65531 > > is written to log.txt, which is expected > JSON.stringify(new Array((4096*3)+818)).length // 65531 > > when I add 1 to that input array > port.postMessage(new Array((4096*3)+819)); > > 1567386741 > > is written to log.txt. > The relevant Node.js code > > function getMessage() { > const header = new Uint32Array(1); > readSync(0, header); > const content = new Uint8Array(header[0]); > writeFileSync('log.txt', JSON.stringify(header[0])); > readSync(0, content); > return content; > } > > and Deno code > > async function getMessage() { > const header = new Uint32Array(1); > await Deno.stdin.read(header); > await Deno.writeTextFile("log.txt", header[0]); > const output = new Uint8Array(header[0]); > await Deno.stdin.read(output); > return output; > } > On Saturday, December 31, 2022 at 2:35:32 PM UTC-8 guest271314 wrote: > > Back to top <#m_2400262473293151249_digest_top> > You received this digest because you're subscribed to updates for this > group. You can change your settings on the group membership page > <https://groups.google.com/forum/?utm_source=digest&utm_medium=email#!forum/v8-users/join> > . > To unsubscribe from this group and stop receiving emails from it send an > email to v8-users+unsubscr...@googlegroups.com. > -- -- v8-users mailing list v8-users@googlegroups.com http://groups.google.com/group/v8-users --- You received this message because you are subscribed to the Google Groups "v8-users" group. To unsubscribe from this group and stop receiving emails from it, send an email to v8-users+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/v8-users/CA%2BsyWAMBs8EGwowKJswE0bHaNu8hvdK9-vueR0gtn0XEXmuZ9A%40mail.gmail.com.
