Memory leak adding files from path to Zip with Symfony

[althaus]

ZipStream-PHP version

3.1.2

PHP version

8.2.28

Constraints for Bug Report

• I'm using a version of ZipStream that is currently supported:
  https://github.com/maennchen/ZipStream-PHP#version-support

• I'm using a version of PHP that has active support:
  https://www.php.net/supported-versions.php

• I'm using a version of PHP that is compatible with your used
  ZipStream version.

• I'm using the latest release of the used ZipStream major version.

Summary

Hi,

I've got an issue I'd need some help with. I've got a project where I'm adding lots of files (~ 100) to a ZIP archive using Symfony. A customer of mine reported broken ZIP archives and after digging into the code I've found out that there's some kind of memory leak.

My code looks like this (simplified):

$response = new StreamedResponse(function () use ($files, $zipName) {
            // Prepare ZIP archive
            $zip = new ZipStream(
                defaultEnableZeroHeader: true,
                outputName: $zipName,
                contentType: 'application/octet-stream',
                flushOutput: true,
            );

            // Iterate over files and add them to the archive
            foreach ($files as $file) {
                try {
                    $size = $file->getSize();
                    $zip->addFileFromPath(
                        fileName: $file->name,
                        path: $file->getPathname(),
                        exactSize: false === $size ? null : $size,
                    );
                } catch (\Throwable $e) {
                    $this->logger->error('Could not add file {file} to archive!', [
                        'file' => $file->getFilename(),
                        'exception' => $e,
                    ]);
                } finally {
                    unset($file);
                }
            }

            $zip->finish();
        });

This response is just send through a Symfony controller.

Current behavior

The server runs with 64 MB and I'm trying to add 100 files (user uploads) from disk with file sizes up to 80 MB each. In theory there should be no problem as everyhing gets streamed. The issue now is that Symfony runs into an OutOfMemoryException:

request.CRITICAL: Uncaught PHP Exception Symfony\Component\ErrorHandler\Error\OutOfMemoryError: "Error: Allowed memory size of 67108864 bytes exhausted (tried to allocate 16969928 bytes)" at File.php line 345 {"exception":"[object] (Symfony\Component\ErrorHandler\Error\OutOfMemoryError(code: 0): Error: Allowed memory size of 67108864 bytes exhausted (tried to allocate 16969928 bytes) at /path/to/app/vendor/maennchen/zipstream-php/src/File.php:345)"} []

If I double the available RAM to 128 MB the archive is generated properly. I've added some more logging to debug the memory consumption:

[2025-03-27T12:02:44.362089+01:00] app.ERROR: Response: 326498dd-c4d7-4ad0-9006-369cfe28f0ad - File: be97ffdb-2223-4046-a061-662fbe183645 - Memory: 5190912 / 6349848 [] []
[2025-03-27T12:02:44.377531+01:00] app.ERROR: Response: 326498dd-c4d7-4ad0-9006-369cfe28f0ad - File: f391abf5-65da-41d8-87de-9b705bca5a37 - Memory: 5327264 / 6490160 [] []
[2025-03-27T12:02:44.406182+01:00] app.ERROR: Response: 326498dd-c4d7-4ad0-9006-369cfe28f0ad - File: cfe208e4-680a-4866-b509-b32824ff958c - Memory: 5335584 / 7424176 [] []
[2025-03-27T12:02:44.434935+01:00] app.ERROR: Response: 326498dd-c4d7-4ad0-9006-369cfe28f0ad - File: b7405dac-0381-4030-935b-fad704ee4fec - Memory: 5376672 / 7432496 [] []
[2025-03-27T12:02:44.436918+01:00] app.ERROR: Response: 603f6c2c-28e6-4806-bf33-5966792a7634 - File: 0886cdf4-af4e-4099-b56a-431989138d85 - Memory: 5376784 / 7432496 [] []
[2025-03-27T12:02:44.481339+01:00] app.ERROR: Response: 603f6c2c-28e6-4806-bf33-5966792a7634 - File: 2b76f1bd-4628-411c-9c67-4e27eedbad83 - Memory: 5512064 / 7768584 [] []
[2025-03-27T12:02:44.523841+01:00] app.ERROR: Response: 603f6c2c-28e6-4806-bf33-5966792a7634 - File: 4ab97f66-66f8-40f4-b903-ad75acc32474 - Memory: 5512176 / 7768584 [] []
[2025-03-27T12:02:44.550377+01:00] app.ERROR: Response: 603f6c2c-28e6-4806-bf33-5966792a7634 - File: a3ad3dba-0bfe-427a-ab6c-c1c7c80d31e7 - Memory: 5512288 / 7768584 [] []
[2025-03-27T12:02:44.617862+01:00] app.ERROR: Response: 78a0f3ee-0123-44b4-be2f-0e29c98bc3ed - File: 9d3942a0-fe5e-45fa-a5c0-19f0c3e1f882 - Memory: 6327664 / 9616216 [] []
[2025-03-27T12:02:44.622266+01:00] app.ERROR: Response: 78a0f3ee-0123-44b4-be2f-0e29c98bc3ed - File: dd6fd656-7953-49f1-b9d0-393e2bb96c68 - Memory: 6327776 / 9616216 [] []
[2025-03-27T12:02:44.667389+01:00] app.ERROR: Response: 4cff132b-53ca-4c66-bd48-43e6567dcf8b - File: 186a0868-8e4a-4446-a2b1-87371bd22b9f - Memory: 6327936 / 9616216 [] []
[2025-03-27T12:02:44.715629+01:00] app.ERROR: Response: 4cff132b-53ca-4c66-bd48-43e6567dcf8b - File: 5149b142-5411-4d5b-a5ca-850b10aac08c - Memory: 6328096 / 9616216 [] []
[2025-03-27T12:02:44.763261+01:00] app.ERROR: Response: 4cff132b-53ca-4c66-bd48-43e6567dcf8b - File: ce7b6d7e-e25d-406c-afa1-fc95e9f5852f - Memory: 6328256 / 9616216 [] []
[2025-03-27T12:02:44.807389+01:00] app.ERROR: Response: 4cff132b-53ca-4c66-bd48-43e6567dcf8b - File: 8b0c6dc1-7e43-4594-b2a1-9188974341aa - Memory: 6328416 / 9616216 [] []
[2025-03-27T12:02:44.911740+01:00] app.ERROR: Response: 4cff132b-53ca-4c66-bd48-43e6567dcf8b - File: 38a1d12f-6416-45d8-a2a3-1620ee3f34c2 - Memory: 7147752 / 12181408 [] []
[2025-03-27T12:02:44.914380+01:00] app.ERROR: Response: d01d124b-5b38-4b7f-baba-6b83ffac2084 - File: 99b5390e-a472-4424-870e-708de062c425 - Memory: 7147864 / 12181408 [] []
[2025-03-27T12:02:44.919397+01:00] app.ERROR: Response: d01d124b-5b38-4b7f-baba-6b83ffac2084 - File: c32c9ceb-f266-4939-8d1d-785785d7dadf - Memory: 7148280 / 12181408 [] []
[2025-03-27T12:02:44.933979+01:00] app.ERROR: Response: d01d124b-5b38-4b7f-baba-6b83ffac2084 - File: a41af13f-e5e4-434f-ae59-c666e4e8e5be - Memory: 7148376 / 12181408 [] []
[2025-03-27T12:02:44.939423+01:00] app.ERROR: Response: d01d124b-5b38-4b7f-baba-6b83ffac2084 - File: 59a55039-6606-4b73-84b6-9497bb417cae - Memory: 7148472 / 12181408 [] []
[2025-03-27T12:02:44.946074+01:00] app.ERROR: Response: d01d124b-5b38-4b7f-baba-6b83ffac2084 - File: 9fe2eb5a-f3da-4f22-9380-4296c8d52b51 - Memory: 7148568 / 12181408 [] []
[2025-03-27T12:02:44.959481+01:00] app.ERROR: Response: d01d124b-5b38-4b7f-baba-6b83ffac2084 - File: 93fed807-15be-40cf-ad1a-8d13a99b5a10 - Memory: 7148664 / 12181408 [] []
[2025-03-27T12:02:44.964321+01:00] app.ERROR: Response: d01d124b-5b38-4b7f-baba-6b83ffac2084 - File: 1e8e5c2b-6d7c-4b9a-b8ba-2a0889f5bd36 - Memory: 7148760 / 12181408 [] []
[2025-03-27T12:02:44.984172+01:00] app.ERROR: Response: d01d124b-5b38-4b7f-baba-6b83ffac2084 - File: cca3c797-1c6d-4958-a317-2a385eb25e51 - Memory: 7148856 / 12181408 [] []
[2025-03-27T12:02:45.001273+01:00] app.ERROR: Response: d01d124b-5b38-4b7f-baba-6b83ffac2084 - File: 3eef80cf-5192-487f-aac5-5ac1092d0226 - Memory: 7148952 / 12181408 [] []
[2025-03-27T12:02:45.134896+01:00] app.ERROR: Response: 73d405a6-769c-4e5b-9a9d-90c8d1158312 - File: 966980bd-f4aa-4178-ad21-90d88453cc51 - Memory: 8594936 / 15594680 [] []
[2025-03-27T12:02:45.139352+01:00] app.ERROR: Response: 73d405a6-769c-4e5b-9a9d-90c8d1158312 - File: 4d0addf2-e3fe-487b-82a4-a3fa678abdb3 - Memory: 8595048 / 15594680 [] []
[2025-03-27T12:02:45.404157+01:00] app.ERROR: Response: 15379a62-185e-4c18-95fe-16b1217370e1 - File: 7e8233eb-28b3-4008-8a45-5cbc5192fce0 - Memory: 9074392 / 18032016 [] []
[2025-03-27T12:02:45.466220+01:00] app.ERROR: Response: 15379a62-185e-4c18-95fe-16b1217370e1 - File: f223f472-25e6-4da4-938c-c896be8f26ea - Memory: 9074504 / 18032016 [] []
[2025-03-27T12:02:46.073783+01:00] app.ERROR: Response: 15379a62-185e-4c18-95fe-16b1217370e1 - File: 298b84ac-9f4e-408d-8c8f-7b19ed3a4710 - Memory: 9074632 / 18032016 [] []
[2025-03-27T12:02:46.142772+01:00] app.ERROR: Response: 15379a62-185e-4c18-95fe-16b1217370e1 - File: 7374b994-83b3-41bc-9256-891c39265455 - Memory: 9074760 / 18032016 [] []
[2025-03-27T12:02:47.145213+01:00] app.ERROR: Response: 404b5276-6af5-45bb-bb32-22ffa4862aa4 - File: 59a1a6b7-2554-4bdc-9ec4-5cab8752dc1e - Memory: 11385016 / 23156592 [] []
[2025-03-27T12:02:48.050270+01:00] app.ERROR: Response: 404b5276-6af5-45bb-bb32-22ffa4862aa4 - File: 94dbb793-4359-44e4-b5dc-13dbdf1e7773 - Memory: 11385128 / 23156592 [] []
[2025-03-27T12:02:48.837138+01:00] app.ERROR: Response: 404b5276-6af5-45bb-bb32-22ffa4862aa4 - File: f9f9cb81-7b13-4fc9-ab70-80fd05dc5626 - Memory: 11385880 / 24856656 [] []
[2025-03-27T12:02:49.396297+01:00] app.ERROR: Response: 404b5276-6af5-45bb-bb32-22ffa4862aa4 - File: 522592d9-1753-4ba8-ae17-38b0c8377913 - Memory: 11385992 / 24856656 [] []
[2025-03-27T12:02:49.438178+01:00] app.ERROR: Response: 8f9011ab-57d5-4e62-9949-14b4bd0474a8 - File: 3c053630-ba20-4eed-914b-7b5269ba8f9e - Memory: 11386120 / 24856656 [] []
[2025-03-27T12:02:49.754003+01:00] app.ERROR: Response: 8f9011ab-57d5-4e62-9949-14b4bd0474a8 - File: 7f976fa4-d9d4-4754-981d-1d98f34e9544 - Memory: 11386248 / 24856656 [] []
[2025-03-27T12:02:49.840072+01:00] app.ERROR: Response: 8f9011ab-57d5-4e62-9949-14b4bd0474a8 - File: 28503cee-9ac9-47a8-97af-91c59b6b154e - Memory: 11386376 / 24856656 [] []
[2025-03-27T12:02:50.242669+01:00] app.ERROR: Response: dd3948e4-9f69-4435-86b9-2602efb17f20 - File: b55316d5-97c8-4487-9c9c-daadae613662 - Memory: 11386472 / 24856656 [] []
[2025-03-27T12:02:50.550840+01:00] app.ERROR: Response: dd3948e4-9f69-4435-86b9-2602efb17f20 - File: 6c7f7ec3-aa1c-4923-a795-6908324f4723 - Memory: 11386568 / 24856656 [] []
[2025-03-27T12:02:50.850940+01:00] app.ERROR: Response: dd3948e4-9f69-4435-86b9-2602efb17f20 - File: 1ce72c92-105b-4385-889e-e27d8ad2bdd5 - Memory: 11386664 / 24856656 [] []
[2025-03-27T12:02:51.153220+01:00] app.ERROR: Response: dd3948e4-9f69-4435-86b9-2602efb17f20 - File: 9653e0c8-f91f-44bb-8172-d6e9210a339b - Memory: 11386760 / 24856656 [] []
[2025-03-27T12:02:51.455828+01:00] app.ERROR: Response: dd3948e4-9f69-4435-86b9-2602efb17f20 - File: 37e6b354-e3bb-442c-bd2f-78f7dacff6f6 - Memory: 11386856 / 24856656 [] []
[2025-03-27T12:02:51.597306+01:00] app.ERROR: Response: 9f8c5f71-1c07-42a5-867d-fa91a6f05af2 - File: cd183606-b018-487b-8bbe-e522c1a40740 - Memory: 11386968 / 24856656 [] []
[2025-03-27T12:02:51.602218+01:00] app.ERROR: Response: 9f8c5f71-1c07-42a5-867d-fa91a6f05af2 - File: 8e5dd129-d898-494b-9806-084aa6c1714c - Memory: 11387080 / 24856656 [] []
[2025-03-27T12:02:51.606714+01:00] app.ERROR: Response: 20690b7e-ab96-447a-94b2-c63814ad8fc1 - File: 30b56fbe-010e-44b4-93fb-507b771280f2 - Memory: 11387192 / 24856656 [] []
[2025-03-27T12:02:51.877391+01:00] app.ERROR: Response: 20690b7e-ab96-447a-94b2-c63814ad8fc1 - File: e088d18b-6328-4ee3-ad30-49d0234392f5 - Memory: 11387320 / 24856656 [] []
[2025-03-27T12:02:52.138475+01:00] app.ERROR: Response: 4db29a9b-c175-45f3-87fc-f697cc6f1c8f - File: c5bcee5e-e02b-41b1-a2c9-8c72a62b34d6 - Memory: 11387432 / 24856656 [] []
[2025-03-27T12:02:52.660067+01:00] app.ERROR: Response: 4db29a9b-c175-45f3-87fc-f697cc6f1c8f - File: 3aa541c8-4b36-4c2a-9d73-862444de2044 - Memory: 11387544 / 24856656 [] []
[2025-03-27T12:02:53.036064+01:00] app.ERROR: Response: 4db29a9b-c175-45f3-87fc-f697cc6f1c8f - File: c221a540-5c23-4a5d-9d90-07efe840b79b - Memory: 11387656 / 24856656 [] []
[2025-03-27T12:02:53.050820+01:00] app.ERROR: Response: 4db29a9b-c175-45f3-87fc-f697cc6f1c8f - File: 13c7f4ce-7083-4582-92c9-859afe338b26 - Memory: 11387768 / 24856656 [] []
[2025-03-27T12:02:53.271791+01:00] app.ERROR: Response: 36f255da-6be0-45ef-98eb-2aaf639e3919 - File: be1c87dd-66ed-4caf-9e1b-0ab4f0401c45 - Memory: 11387880 / 24856656 [] []
[2025-03-27T12:02:53.388613+01:00] app.ERROR: Response: 36f255da-6be0-45ef-98eb-2aaf639e3919 - File: 15f6da4c-fae4-402c-bef1-e2d4ad129087 - Memory: 11387992 / 24856656 [] []
[2025-03-27T12:02:53.638874+01:00] app.ERROR: Response: 36f255da-6be0-45ef-98eb-2aaf639e3919 - File: 1c8ec785-dda1-4061-9ac8-4d630ba71870 - Memory: 11388104 / 24856656 [] []
[2025-03-27T12:02:53.928452+01:00] app.ERROR: Response: 36f255da-6be0-45ef-98eb-2aaf639e3919 - File: 04421bea-e261-4066-ab8e-83b9f93ad46d - Memory: 11388216 / 24856656 [] []
[2025-03-27T12:02:54.212388+01:00] app.ERROR: Response: 36f255da-6be0-45ef-98eb-2aaf639e3919 - File: 67908714-de1a-4002-ab59-0ad380b12600 - Memory: 11388328 / 24856656 [] []
[2025-03-27T12:02:54.368005+01:00] app.ERROR: Response: d48ecafc-1799-4855-ac1c-fe41c25cc5b4 - File: 7d7883b6-4619-4701-973c-c4585cbcf6bb - Memory: 11388440 / 24856656 [] []
[2025-03-27T12:02:54.401499+01:00] app.ERROR: Response: e2178ae0-c420-492c-a96e-f0a91dfcb5e4 - File: d06bc3f5-0f52-4c92-8c0d-a9cc001a1046 - Memory: 11388552 / 24856656 [] []
[2025-03-27T12:02:54.440257+01:00] app.ERROR: Response: e2178ae0-c420-492c-a96e-f0a91dfcb5e4 - File: 1828af40-ce8b-483f-9c62-9bd4c9f44ee8 - Memory: 11388712 / 24856656 [] []
[2025-03-27T12:02:54.626897+01:00] app.ERROR: Response: e2178ae0-c420-492c-a96e-f0a91dfcb5e4 - File: b136fb51-8024-48eb-a3a1-4fff1cffb623 - Memory: 11388872 / 24856656 [] []
[2025-03-27T12:02:54.669445+01:00] app.ERROR: Response: e2178ae0-c420-492c-a96e-f0a91dfcb5e4 - File: 5b1d5c42-897c-41ec-8fad-071df957ee75 - Memory: 11389032 / 24856656 [] []
[2025-03-27T12:02:54.679837+01:00] app.ERROR: Response: 4ab43c11-b464-4921-83eb-6ea573715e0f - File: 56e82e4a-8e7a-472e-a3ae-501b4adce67f - Memory: 11389160 / 24856656 [] []
[2025-03-27T12:02:54.694196+01:00] app.ERROR: Response: 4ab43c11-b464-4921-83eb-6ea573715e0f - File: 5df27d39-21e0-4223-aa4e-6a0f34359cf4 - Memory: 11389288 / 24856656 [] []
[2025-03-27T12:02:54.705758+01:00] app.ERROR: Response: 4ab43c11-b464-4921-83eb-6ea573715e0f - File: feb78659-0471-426e-ba8f-418da50e76aa - Memory: 11389448 / 24856656 [] []
[2025-03-27T12:02:54.711966+01:00] app.ERROR: Response: 4ab43c11-b464-4921-83eb-6ea573715e0f - File: 0b118ea9-8577-4395-898b-5a84d76e9d45 - Memory: 11389560 / 24856656 [] []
[2025-03-27T12:02:54.718292+01:00] app.ERROR: Response: 4ab43c11-b464-4921-83eb-6ea573715e0f - File: 3dca17d1-1bee-4d13-b158-27c8a31ab1b8 - Memory: 11390952 / 24856656 [] []
[2025-03-27T12:02:54.840471+01:00] app.ERROR: Response: 4ab43c11-b464-4921-83eb-6ea573715e0f - File: f08f5d5b-3cc5-454a-99b2-20399c726fa2 - Memory: 11391080 / 24856656 [] []
[2025-03-27T12:02:54.854773+01:00] app.ERROR: Response: 4ab43c11-b464-4921-83eb-6ea573715e0f - File: 2df8ac52-a21c-44bd-ab3a-9548bcd0dc6c - Memory: 11391208 / 24856656 [] []
[2025-03-27T12:02:54.867816+01:00] app.ERROR: Response: 4ab43c11-b464-4921-83eb-6ea573715e0f - File: 9a1304d9-2766-43dd-8e84-b09defeba7ac - Memory: 11391336 / 24856656 [] []
[2025-03-27T12:02:54.875203+01:00] app.ERROR: Response: 4ab43c11-b464-4921-83eb-6ea573715e0f - File: 35e8d318-4b9e-4fe2-b59f-6cf22051f424 - Memory: 11391464 / 24856656 [] []
[2025-03-27T12:02:54.884763+01:00] app.ERROR: Response: 4ab43c11-b464-4921-83eb-6ea573715e0f - File: f1b68de2-36f2-4788-8304-0ef01d2b4a6c - Memory: 11391592 / 24856656 [] []
[2025-03-27T12:02:54.893797+01:00] app.ERROR: Response: 4ab43c11-b464-4921-83eb-6ea573715e0f - File: 7be11ba6-dfaf-43e5-9163-6a8026d6a856 - Memory: 11391704 / 24856656 [] []
[2025-03-27T12:02:54.986212+01:00] app.ERROR: Response: 2fbf02ad-c924-4f17-bbb6-4c117ecc33b6 - File: 255e5fab-d8f4-49a8-b206-beb0fb9ce100 - Memory: 11391832 / 24856656 [] []
[2025-03-27T12:02:54.989018+01:00] app.ERROR: Response: 2fbf02ad-c924-4f17-bbb6-4c117ecc33b6 - File: fd21a87d-7119-4b2f-a8f2-77238126b0c7 - Memory: 11391944 / 24856656 [] []
[2025-03-27T12:02:55.012991+01:00] app.ERROR: Response: dc660ca5-fef5-4218-a3bc-b3391dfcbdaa - File: 48467f01-8814-4ea1-b008-2e7abf87581a - Memory: 11392072 / 24856656 [] []
[2025-03-27T12:02:55.052114+01:00] app.ERROR: Response: dc660ca5-fef5-4218-a3bc-b3391dfcbdaa - File: 7e17f06a-5c32-40a0-9be8-683a08cb2a4f - Memory: 11392184 / 24856656 [] []
[2025-03-27T12:02:55.075201+01:00] app.ERROR: Response: dc660ca5-fef5-4218-a3bc-b3391dfcbdaa - File: 454ecd5c-25e4-4485-9e82-d3cec4992aa9 - Memory: 11392296 / 24856656 [] []
[2025-03-27T12:02:55.083829+01:00] app.ERROR: Response: dc660ca5-fef5-4218-a3bc-b3391dfcbdaa - File: dad8e806-39ee-4252-a2ca-147c3bca7ac1 - Memory: 11392408 / 24856656 [] []
[2025-03-27T12:02:55.252000+01:00] app.ERROR: Response: dc660ca5-fef5-4218-a3bc-b3391dfcbdaa - File: a8b9f60b-6df2-45f0-a9c9-04526ca80bcc - Memory: 11392520 / 24856656 [] []
[2025-03-27T12:02:56.252147+01:00] app.ERROR: Response: dc660ca5-fef5-4218-a3bc-b3391dfcbdaa - File: 80412201-0c77-4777-a285-bdcc4871ce73 - Memory: 20371064 / 43541816 [] []
[2025-03-27T12:03:00.066732+01:00] app.ERROR: Response: dc660ca5-fef5-4218-a3bc-b3391dfcbdaa - File: 9b02d5ef-a8e1-4b0c-9437-5625b83be261 - Memory: 21268200 / 54347176 [] []
[2025-03-27T12:03:00.280389+01:00] app.ERROR: Response: 1d2b7d00-f7b7-4ab6-ba27-c526c1ecebe7 - File: 9af6f362-821c-4a2e-b4ca-9b2932935e91 - Memory: 21268296 / 54347176 [] []
[2025-03-27T12:03:00.509996+01:00] app.ERROR: Response: 4d80446f-7146-4a06-9831-0c564fb364a4 - File: 460a16f0-bf5b-42e6-8cf9-48baf68e5f10 - Memory: 21268424 / 54347176 [] []
[2025-03-27T12:03:00.706819+01:00] app.ERROR: Response: 4d80446f-7146-4a06-9831-0c564fb364a4 - File: 5a5b3f83-4591-4e2f-b703-6ebfd14899ed - Memory: 21268552 / 54347176 [] []
[2025-03-27T12:03:00.915254+01:00] app.ERROR: Response: 4d80446f-7146-4a06-9831-0c564fb364a4 - File: 5097a609-49e5-440f-9aef-d64cbd09590a - Memory: 21268680 / 54347176 [] []
[2025-03-27T12:03:00.930653+01:00] app.ERROR: Response: 4d80446f-7146-4a06-9831-0c564fb364a4 - File: 148d6184-bfe2-45c6-b1f8-506bf19f4e15 - Memory: 21268792 / 54347176 [] []
[2025-03-27T12:03:00.953350+01:00] app.ERROR: Response: e38b2566-d60d-4363-9af2-f879992ae378 - File: 378044b5-4a66-432c-89cd-99bc6930f531 - Memory: 21268904 / 54347176 [] []
[2025-03-27T12:03:00.961428+01:00] app.ERROR: Response: e38b2566-d60d-4363-9af2-f879992ae378 - File: ce7a13ca-2e12-4aeb-8bc6-b5a4240850e0 - Memory: 21269016 / 54347176 [] []
[2025-03-27T12:03:01.313689+01:00] app.ERROR: Response: e38b2566-d60d-4363-9af2-f879992ae378 - File: 8601ebf3-0c17-4736-ba87-5759c1446b95 - Memory: 21269144 / 54347176 [] []
[2025-03-27T12:03:01.841085+01:00] app.ERROR: Response: ac9a5918-5112-4510-904f-b4e8fb66500c - File: 5c720460-3092-4084-aa37-5a9a8f391c85 - Memory: 21269256 / 54347176 [] []
[2025-03-27T12:03:01.843592+01:00] app.ERROR: Response: c896026e-3a41-4afb-86f6-56d10740be0e - File: 60f4110c-46ad-4c24-a4cd-f7af27166848 - Memory: 21269368 / 54347176 [] []
[2025-03-27T12:03:01.900453+01:00] app.ERROR: Response: b30c7b20-612e-41f5-936c-e9fa36b3d21c - File: b67dd2eb-6894-46b3-b098-eca3f75518b2 - Memory: 21269464 / 54347176 [] []
[2025-03-27T12:03:02.179191+01:00] app.ERROR: Response: b30c7b20-612e-41f5-936c-e9fa36b3d21c - File: de29c31d-977d-44cb-b9d3-d4fdcca36c89 - Memory: 21269560 / 54347176 [] []
[2025-03-27T12:03:02.672746+01:00] app.ERROR: Response: b30c7b20-612e-41f5-936c-e9fa36b3d21c - File: aa40534d-0521-43d1-87aa-f6e519b0b5da - Memory: 21269656 / 54347176 [] []
[2025-03-27T12:03:02.781070+01:00] app.ERROR: Response: b30c7b20-612e-41f5-936c-e9fa36b3d21c - File: 9b088bb5-de43-4db9-b4a7-2a9c63672530 - Memory: 21269752 / 54347176 [] []
[2025-03-27T12:03:03.153410+01:00] app.ERROR: Response: 59cab006-c2c8-42ec-a49a-fd9007b3f31e - File: 0799bd31-6ee5-48cd-a28f-e75fc360afe6 - Memory: 21269848 / 54347176 [] []
[2025-03-27T12:03:03.467372+01:00] app.ERROR: Response: 59cab006-c2c8-42ec-a49a-fd9007b3f31e - File: 3bed7a59-b472-4d05-99f7-a2a5ceba2e8f - Memory: 21269944 / 54347176 [] []
[2025-03-27T12:03:03.764448+01:00] app.ERROR: Response: 59cab006-c2c8-42ec-a49a-fd9007b3f31e - File: e69ce17d-fb98-4b11-a01a-58964d0ed60c - Memory: 21270040 / 54347176 [] []
[2025-03-27T12:03:04.185943+01:00] app.ERROR: Response: 59cab006-c2c8-42ec-a49a-fd9007b3f31e - File: eb297bea-d876-4bcb-8488-8a75e70788e4 - Memory: 21270136 / 54347176 [] []
[2025-03-27T12:03:04.326968+01:00] app.ERROR: Response: 59cab006-c2c8-42ec-a49a-fd9007b3f31e - File: af3fd3de-df7a-46fc-91e4-b1ae1e888247 - Memory: 21270232 / 54347176 [] []

Memory is current and peak usage and slowly creeping up and I just don't know why. Running my code without the ZIP parts the script consumes just 4 MB statically, so I'd say my code doesn't have an issue in general.

How to reproduce

I'm unable to create a standalone reproduction case. I've played around with all kind of number of files and sizes. It only breaks on the customer's deployment.

Expected behavior

No memory leak. :D

[maennchen]

I have no experience with that small amount of memory provided.

I would guess that you will run into issues with memory that small with the garbage collector. I don't think that we generally have a memory leak in the library. (Besides the CDF header entries we need to keep until the end of the file and are generally tiny.)

You could try to force garbage collection between new files using gc_collect_cycles. This could help since the PHP garbage collector only runs once more than 10k objects are in its root buffer. See: https://www.php.net/manual/en/features.gc.collecting-cycles.php This might be too high for 64mb and the collector will not run before memory runs out.

If you're able to create a reproduction which shows an active memory leak with a properly functioning garbage collector, I'm happy to take a look. But as it is, I would just recommend to increase memory to a more suitable amount.

I know of many use cases involving very large files and also ones with an incredible amount of files (over 10k) and those generally work well.