Wasmi 2.0 - Engineering of the Fastest Wasm Interpreters
https://www.reddit.com/r/programming/comments/1w4b2ep/wasmi_20_engineering_of_the_fastest_wasm/
submitted by /u/tjpalmer (https://www.reddit.com/user/tjpalmer)
[link] (https://wasmi-labs.github.io/blog/posts/wasmi-v2.0/) [comments] (https://www.reddit.com/r/programming/comments/1w4b2ep/wasmi_20_engineering_of_the_fastest_wasm/)
https://www.reddit.com/r/programming/comments/1w4b2ep/wasmi_20_engineering_of_the_fastest_wasm/
submitted by /u/tjpalmer (https://www.reddit.com/user/tjpalmer)
[link] (https://wasmi-labs.github.io/blog/posts/wasmi-v2.0/) [comments] (https://www.reddit.com/r/programming/comments/1w4b2ep/wasmi_20_engineering_of_the_fastest_wasm/)
I need to keep some Slack connections alive. This should be easy.
https://www.reddit.com/r/programming/comments/1w4c3a6/i_need_to_keep_some_slack_connections_alive_this/
<!-- SC_OFF -->Okay, but I have multiple replicas. And it gets slightly worse: the number of physical connections is not equal to the number of replicas, and it is not equal to the number of business-level connectors either. Several business connectors may share one external identity. One external identity may require several physical connections. And those connections need to be spread across whatever replicas are currently alive and have capacity. So who actually owns the connection? Then the questions start piling up. What if one replica dies?
What if it doesn’t die, but loses access to the database?
What if two replicas race for the same connection?
What if the event that was supposed to wake the right worker never arrives?
What if most workers are already full? A few questions and 2 hours of midnight walk in headphones and ChatGPT later, I had leases, runtime slots, reconciliation, failover, capacity limits, and a distributed ownership problem on my hands. This is the architecture I ended up with, and I have mixed feelings about this design. On one hand, I’m proud that I managed to account for so many different edge cases. On the other, the whole thing feels worryingly complex. So I’d really value input from people who have built similar systems. What did I miss or do you see anything that can break?
And most importantly: what can be simplified without losing the guarantees? The full architecture description is a bit lengthy: AEON NEON - Connector Runtime - by Jarek J. (https://failedexperiments.substack.com/p/aeon-neon-connector-runtime) Many thanks if you decide to read it and share your thoughts. I’d really like this one not to become another failed experiment. <!-- SC_ON --> submitted by /u/doker0 (https://www.reddit.com/user/doker0)
[link] (https://failedexperiments.substack.com/p/aeon-neon-connector-runtime) [comments] (https://www.reddit.com/r/programming/comments/1w4c3a6/i_need_to_keep_some_slack_connections_alive_this/)
https://www.reddit.com/r/programming/comments/1w4c3a6/i_need_to_keep_some_slack_connections_alive_this/
<!-- SC_OFF -->Okay, but I have multiple replicas. And it gets slightly worse: the number of physical connections is not equal to the number of replicas, and it is not equal to the number of business-level connectors either. Several business connectors may share one external identity. One external identity may require several physical connections. And those connections need to be spread across whatever replicas are currently alive and have capacity. So who actually owns the connection? Then the questions start piling up. What if one replica dies?
What if it doesn’t die, but loses access to the database?
What if two replicas race for the same connection?
What if the event that was supposed to wake the right worker never arrives?
What if most workers are already full? A few questions and 2 hours of midnight walk in headphones and ChatGPT later, I had leases, runtime slots, reconciliation, failover, capacity limits, and a distributed ownership problem on my hands. This is the architecture I ended up with, and I have mixed feelings about this design. On one hand, I’m proud that I managed to account for so many different edge cases. On the other, the whole thing feels worryingly complex. So I’d really value input from people who have built similar systems. What did I miss or do you see anything that can break?
And most importantly: what can be simplified without losing the guarantees? The full architecture description is a bit lengthy: AEON NEON - Connector Runtime - by Jarek J. (https://failedexperiments.substack.com/p/aeon-neon-connector-runtime) Many thanks if you decide to read it and share your thoughts. I’d really like this one not to become another failed experiment. <!-- SC_ON --> submitted by /u/doker0 (https://www.reddit.com/user/doker0)
[link] (https://failedexperiments.substack.com/p/aeon-neon-connector-runtime) [comments] (https://www.reddit.com/r/programming/comments/1w4c3a6/i_need_to_keep_some_slack_connections_alive_this/)
The Browser's Main Thread Is Expensive
https://www.reddit.com/r/programming/comments/1w4ctb4/the_browsers_main_thread_is_expensive/
submitted by /u/kciter (https://www.reddit.com/user/kciter)
[link] (https://kciter.so/posts/the-expensive-main-thread/en/) [comments] (https://www.reddit.com/r/programming/comments/1w4ctb4/the_browsers_main_thread_is_expensive/)
https://www.reddit.com/r/programming/comments/1w4ctb4/the_browsers_main_thread_is_expensive/
submitted by /u/kciter (https://www.reddit.com/user/kciter)
[link] (https://kciter.so/posts/the-expensive-main-thread/en/) [comments] (https://www.reddit.com/r/programming/comments/1w4ctb4/the_browsers_main_thread_is_expensive/)
Bazel's UX is really, really, really bad
https://www.reddit.com/r/programming/comments/1w4fp67/bazels_ux_is_really_really_really_bad/
submitted by /u/drmorr0 (https://www.reddit.com/user/drmorr0)
[link] (https://blog.appliedcomputing.io/p/bazels-ux-is-really-really-really) [comments] (https://www.reddit.com/r/programming/comments/1w4fp67/bazels_ux_is_really_really_really_bad/)
https://www.reddit.com/r/programming/comments/1w4fp67/bazels_ux_is_really_really_really_bad/
submitted by /u/drmorr0 (https://www.reddit.com/user/drmorr0)
[link] (https://blog.appliedcomputing.io/p/bazels-ux-is-really-really-really) [comments] (https://www.reddit.com/r/programming/comments/1w4fp67/bazels_ux_is_really_really_really_bad/)
Performance of WebAssembly runtimes in 2026
https://www.reddit.com/r/programming/comments/1w4g6ga/performance_of_webassembly_runtimes_in_2026/
submitted by /u/fagnerbrack (https://www.reddit.com/user/fagnerbrack)
[link] (https://00f.net/2026/06/23/webassembly-runtimes-2026/) [comments] (https://www.reddit.com/r/programming/comments/1w4g6ga/performance_of_webassembly_runtimes_in_2026/)
https://www.reddit.com/r/programming/comments/1w4g6ga/performance_of_webassembly_runtimes_in_2026/
submitted by /u/fagnerbrack (https://www.reddit.com/user/fagnerbrack)
[link] (https://00f.net/2026/06/23/webassembly-runtimes-2026/) [comments] (https://www.reddit.com/r/programming/comments/1w4g6ga/performance_of_webassembly_runtimes_in_2026/)
We are building an idiomatic RESTful API in Go 1.27
https://www.reddit.com/r/programming/comments/1w522x1/we_are_building_an_idiomatic_restful_api_in_go_127/
<!-- SC_OFF -->100% Human Authored - Both Code/Doc In this series, We build a production-ready containerized RESTful API server application using following packages and tools. Go Standard Library net/http: The most idiomatic way to write web API applications in Go. Chi: The most idiomatic router with middleware and route groups support. Zerolog: Zero Allocation JSON Logger and Faster than slog. Goose: The database migration CLI builder library with lease dependency. Gorm CLI: Generate Go generics-based, type safe, repository functions with no runtime wrappers. Swag and Validator v10: The most prominent OpenAPI specification generator and validation library in Go. Codebase: https://github.com/learning-cloud-native-go/myapp (1000+ GitHub stars- Since 2019) \ Doc: https://learning-cloud-native-go.github.io/docs/building-a-containerized-restful-api/ If anybody wanna check Rust implementation: https://learning-rust.github.io/labs/building-a-containerized-restful-api/ <!-- SC_ON --> submitted by /u/dumindunuwan (https://www.reddit.com/user/dumindunuwan)
[link] (https://learning-cloud-native-go.github.io/docs/building-a-containerized-restful-api/) [comments] (https://www.reddit.com/r/programming/comments/1w522x1/we_are_building_an_idiomatic_restful_api_in_go_127/)
https://www.reddit.com/r/programming/comments/1w522x1/we_are_building_an_idiomatic_restful_api_in_go_127/
<!-- SC_OFF -->100% Human Authored - Both Code/Doc In this series, We build a production-ready containerized RESTful API server application using following packages and tools. Go Standard Library net/http: The most idiomatic way to write web API applications in Go. Chi: The most idiomatic router with middleware and route groups support. Zerolog: Zero Allocation JSON Logger and Faster than slog. Goose: The database migration CLI builder library with lease dependency. Gorm CLI: Generate Go generics-based, type safe, repository functions with no runtime wrappers. Swag and Validator v10: The most prominent OpenAPI specification generator and validation library in Go. Codebase: https://github.com/learning-cloud-native-go/myapp (1000+ GitHub stars- Since 2019) \ Doc: https://learning-cloud-native-go.github.io/docs/building-a-containerized-restful-api/ If anybody wanna check Rust implementation: https://learning-rust.github.io/labs/building-a-containerized-restful-api/ <!-- SC_ON --> submitted by /u/dumindunuwan (https://www.reddit.com/user/dumindunuwan)
[link] (https://learning-cloud-native-go.github.io/docs/building-a-containerized-restful-api/) [comments] (https://www.reddit.com/r/programming/comments/1w522x1/we_are_building_an_idiomatic_restful_api_in_go_127/)
Beyond Lambdas: Raising the Abstraction Level of Functional Code
https://www.reddit.com/r/programming/comments/1w53v9c/beyond_lambdas_raising_the_abstraction_level_of/
submitted by /u/nephrenka (https://www.reddit.com/user/nephrenka)
[link] (https://adamtornhill.substack.com/p/beyond-lambdas-raising-the-abstraction) [comments] (https://www.reddit.com/r/programming/comments/1w53v9c/beyond_lambdas_raising_the_abstraction_level_of/)
https://www.reddit.com/r/programming/comments/1w53v9c/beyond_lambdas_raising_the_abstraction_level_of/
submitted by /u/nephrenka (https://www.reddit.com/user/nephrenka)
[link] (https://adamtornhill.substack.com/p/beyond-lambdas-raising-the-abstraction) [comments] (https://www.reddit.com/r/programming/comments/1w53v9c/beyond_lambdas_raising_the_abstraction_level_of/)
Apache Kafka vs Apache Iggy: A Technical Comparison
https://www.reddit.com/r/programming/comments/1w57nle/apache_kafka_vs_apache_iggy_a_technical_comparison/
submitted by /u/mmatloka (https://www.reddit.com/user/mmatloka)
[link] (https://softwaremill.com/apache-kafka-vs-apache-iggy-same-log-different-engine/) [comments] (https://www.reddit.com/r/programming/comments/1w57nle/apache_kafka_vs_apache_iggy_a_technical_comparison/)
https://www.reddit.com/r/programming/comments/1w57nle/apache_kafka_vs_apache_iggy_a_technical_comparison/
submitted by /u/mmatloka (https://www.reddit.com/user/mmatloka)
[link] (https://softwaremill.com/apache-kafka-vs-apache-iggy-same-log-different-engine/) [comments] (https://www.reddit.com/r/programming/comments/1w57nle/apache_kafka_vs_apache_iggy_a_technical_comparison/)
Data Access Patterns That Makes Your CPU Really Angry
https://www.reddit.com/r/programming/comments/1w5ehl9/data_access_patterns_that_makes_your_cpu_really/
submitted by /u/fagnerbrack (https://www.reddit.com/user/fagnerbrack)
[link] (https://blog.weineng.me/posts/slowest_add/) [comments] (https://www.reddit.com/r/programming/comments/1w5ehl9/data_access_patterns_that_makes_your_cpu_really/)
https://www.reddit.com/r/programming/comments/1w5ehl9/data_access_patterns_that_makes_your_cpu_really/
submitted by /u/fagnerbrack (https://www.reddit.com/user/fagnerbrack)
[link] (https://blog.weineng.me/posts/slowest_add/) [comments] (https://www.reddit.com/r/programming/comments/1w5ehl9/data_access_patterns_that_makes_your_cpu_really/)
This Fence Has No Farmer
https://www.reddit.com/r/programming/comments/1w5ff6s/this_fence_has_no_farmer/
submitted by /u/addycodes (https://www.reddit.com/user/addycodes)
[link] (https://adamgreenough.net/blog/this-fence-has-no-farmer/) [comments] (https://www.reddit.com/r/programming/comments/1w5ff6s/this_fence_has_no_farmer/)
https://www.reddit.com/r/programming/comments/1w5ff6s/this_fence_has_no_farmer/
submitted by /u/addycodes (https://www.reddit.com/user/addycodes)
[link] (https://adamgreenough.net/blog/this-fence-has-no-farmer/) [comments] (https://www.reddit.com/r/programming/comments/1w5ff6s/this_fence_has_no_farmer/)
Injections done the right way!
https://www.reddit.com/r/programming/comments/1w5fn7e/injections_done_the_right_way/
submitted by /u/Efficient-Public-551 (https://www.reddit.com/user/Efficient-Public-551)
[link] (https://youtu.be/rEmL9wqxgKQ) [comments] (https://www.reddit.com/r/programming/comments/1w5fn7e/injections_done_the_right_way/)
https://www.reddit.com/r/programming/comments/1w5fn7e/injections_done_the_right_way/
submitted by /u/Efficient-Public-551 (https://www.reddit.com/user/Efficient-Public-551)
[link] (https://youtu.be/rEmL9wqxgKQ) [comments] (https://www.reddit.com/r/programming/comments/1w5fn7e/injections_done_the_right_way/)
Postgres Calculations and the Ambiguity of NULL
https://www.reddit.com/r/programming/comments/1w5gtxg/postgres_calculations_and_the_ambiguity_of_null/
<!-- SC_OFF -->All the ways that NULL can cause chaos in your SQL outcomes. <!-- SC_ON --> submitted by /u/winsletts (https://www.reddit.com/user/winsletts)
[link] (https://www.crunchydata.com/blog/postgres-calculations-and-the-ambiguity-of-null) [comments] (https://www.reddit.com/r/programming/comments/1w5gtxg/postgres_calculations_and_the_ambiguity_of_null/)
https://www.reddit.com/r/programming/comments/1w5gtxg/postgres_calculations_and_the_ambiguity_of_null/
<!-- SC_OFF -->All the ways that NULL can cause chaos in your SQL outcomes. <!-- SC_ON --> submitted by /u/winsletts (https://www.reddit.com/user/winsletts)
[link] (https://www.crunchydata.com/blog/postgres-calculations-and-the-ambiguity-of-null) [comments] (https://www.reddit.com/r/programming/comments/1w5gtxg/postgres_calculations_and_the_ambiguity_of_null/)
Yet Another Sentence Boundary Detector (python, rule-based)
https://www.reddit.com/r/programming/comments/1w5hhdh/yet_another_sentence_boundary_detector_python/
submitted by /u/Speedk4011 (https://www.reddit.com/user/Speedk4011)
[link] (https://hashnode.com/edit/cms4z57tu00010bhr87bw1jtz) [comments] (https://www.reddit.com/r/programming/comments/1w5hhdh/yet_another_sentence_boundary_detector_python/)
https://www.reddit.com/r/programming/comments/1w5hhdh/yet_another_sentence_boundary_detector_python/
submitted by /u/Speedk4011 (https://www.reddit.com/user/Speedk4011)
[link] (https://hashnode.com/edit/cms4z57tu00010bhr87bw1jtz) [comments] (https://www.reddit.com/r/programming/comments/1w5hhdh/yet_another_sentence_boundary_detector_python/)
Let's build a compressor from scratch
https://www.reddit.com/r/programming/comments/1w5l8wx/lets_build_a_compressor_from_scratch/
submitted by /u/aochagavia (https://www.reddit.com/user/aochagavia)
[link] (https://ochagavia.nl/blog/lets-build-a-compressor-from-scratch/) [comments] (https://www.reddit.com/r/programming/comments/1w5l8wx/lets_build_a_compressor_from_scratch/)
https://www.reddit.com/r/programming/comments/1w5l8wx/lets_build_a_compressor_from_scratch/
submitted by /u/aochagavia (https://www.reddit.com/user/aochagavia)
[link] (https://ochagavia.nl/blog/lets-build-a-compressor-from-scratch/) [comments] (https://www.reddit.com/r/programming/comments/1w5l8wx/lets_build_a_compressor_from_scratch/)
CTTI is Exponential, RTTI is Linear
https://www.reddit.com/r/programming/comments/1w5ov1s/ctti_is_exponential_rtti_is_linear/
submitted by /u/gingerbill (https://www.reddit.com/user/gingerbill)
[link] (https://www.gingerbill.org/article/2026/09/02/ctti-is-exponential-rtti-is-linear/) [comments] (https://www.reddit.com/r/programming/comments/1w5ov1s/ctti_is_exponential_rtti_is_linear/)
https://www.reddit.com/r/programming/comments/1w5ov1s/ctti_is_exponential_rtti_is_linear/
submitted by /u/gingerbill (https://www.reddit.com/user/gingerbill)
[link] (https://www.gingerbill.org/article/2026/09/02/ctti-is-exponential-rtti-is-linear/) [comments] (https://www.reddit.com/r/programming/comments/1w5ov1s/ctti_is_exponential_rtti_is_linear/)
Squeezing Performance out of eBPF
https://www.reddit.com/r/programming/comments/1w5p84l/squeezing_performance_out_of_ebpf/
submitted by /u/mttd (https://www.reddit.com/user/mttd)
[link] (https://bitbison.io/blog/ebpf-performance/) [comments] (https://www.reddit.com/r/programming/comments/1w5p84l/squeezing_performance_out_of_ebpf/)
https://www.reddit.com/r/programming/comments/1w5p84l/squeezing_performance_out_of_ebpf/
submitted by /u/mttd (https://www.reddit.com/user/mttd)
[link] (https://bitbison.io/blog/ebpf-performance/) [comments] (https://www.reddit.com/r/programming/comments/1w5p84l/squeezing_performance_out_of_ebpf/)
Ok, but does it scale?
https://www.reddit.com/r/programming/comments/1w6fg39/ok_but_does_it_scale/
submitted by /u/theartofengineering (https://www.reddit.com/user/theartofengineering)
[link] (https://spacetimedb.com/blog/how-does-spacetime-scale) [comments] (https://www.reddit.com/r/programming/comments/1w6fg39/ok_but_does_it_scale/)
https://www.reddit.com/r/programming/comments/1w6fg39/ok_but_does_it_scale/
submitted by /u/theartofengineering (https://www.reddit.com/user/theartofengineering)
[link] (https://spacetimedb.com/blog/how-does-spacetime-scale) [comments] (https://www.reddit.com/r/programming/comments/1w6fg39/ok_but_does_it_scale/)
[PDF] Lost Bytes At The Crossroads Between User- And Kernel-Level Memory Allocation
https://www.reddit.com/r/programming/comments/1w6hm8j/pdf_lost_bytes_at_the_crossroads_between_user_and/
submitted by /u/mttd (https://www.reddit.com/user/mttd)
[link] (https://www.ibr.cs.tu-bs.de/vss/Publications/2026/fistanto_26_lost_bytes.pdf) [comments] (https://www.reddit.com/r/programming/comments/1w6hm8j/pdf_lost_bytes_at_the_crossroads_between_user_and/)
https://www.reddit.com/r/programming/comments/1w6hm8j/pdf_lost_bytes_at_the_crossroads_between_user_and/
submitted by /u/mttd (https://www.reddit.com/user/mttd)
[link] (https://www.ibr.cs.tu-bs.de/vss/Publications/2026/fistanto_26_lost_bytes.pdf) [comments] (https://www.reddit.com/r/programming/comments/1w6hm8j/pdf_lost_bytes_at_the_crossroads_between_user_and/)
Surviving Black Friday: 329 billion requests with Falcon
https://www.reddit.com/r/programming/comments/1wafqim/surviving_black_friday_329_billion_requests_with/
submitted by /u/noteflakes (https://www.reddit.com/user/noteflakes)
[link] (https://www.youtube.com/watch?v=NMruXY3TrpI) [comments] (https://www.reddit.com/r/programming/comments/1wafqim/surviving_black_friday_329_billion_requests_with/)
https://www.reddit.com/r/programming/comments/1wafqim/surviving_black_friday_329_billion_requests_with/
submitted by /u/noteflakes (https://www.reddit.com/user/noteflakes)
[link] (https://www.youtube.com/watch?v=NMruXY3TrpI) [comments] (https://www.reddit.com/r/programming/comments/1wafqim/surviving_black_friday_329_billion_requests_with/)
Swap, memory pressure and the Go GC
https://www.reddit.com/r/programming/comments/1waowcp/swap_memory_pressure_and_the_go_gc/
submitted by /u/andreiross (https://www.reddit.com/user/andreiross)
[link] (https://frn.sh/swap) [comments] (https://www.reddit.com/r/programming/comments/1waowcp/swap_memory_pressure_and_the_go_gc/)
https://www.reddit.com/r/programming/comments/1waowcp/swap_memory_pressure_and_the_go_gc/
submitted by /u/andreiross (https://www.reddit.com/user/andreiross)
[link] (https://frn.sh/swap) [comments] (https://www.reddit.com/r/programming/comments/1waowcp/swap_memory_pressure_and_the_go_gc/)
How to Read Server Monitoring Graphs
https://www.reddit.com/r/programming/comments/1war2cw/how_to_read_server_monitoring_graphs/
submitted by /u/kciter (https://www.reddit.com/user/kciter)
[link] (https://kciter.so/posts/server-monitoring-analysis-guide/en/) [comments] (https://www.reddit.com/r/programming/comments/1war2cw/how_to_read_server_monitoring_graphs/)
https://www.reddit.com/r/programming/comments/1war2cw/how_to_read_server_monitoring_graphs/
submitted by /u/kciter (https://www.reddit.com/user/kciter)
[link] (https://kciter.so/posts/server-monitoring-analysis-guide/en/) [comments] (https://www.reddit.com/r/programming/comments/1war2cw/how_to_read_server_monitoring_graphs/)