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Eyes Above The Waves Robert O'Callahan. Christian. Kiwi. Software guy. All content human-authored unless otherwise noted. robert@ocallahan.org ... Follow on X, Follow on Bluesky Archive 2026 September Goodbye Google August A Meta-Meditation On The Lord's Prayer (And DNA) A Meditation On The Lord's Prayer Queenstown Walks July Thoughts on 'Pacing The Frontier' Karangahake Gorge To Te Aroha March Anthropic And AI Principles January Why Trump Is An Antichrist 2025 December Taiwan November Pouakai Circuit 2025 AI And Jesus In Late 2025: A Road Trip Report October Some Thoughts About Money From A Christian In Big Tech Crosbies Hut June Not Joking About AI Building A PC April Rakiura Northwest Circuit February Tongariro Northern Circuit 2025 January Pararaha Valley 2025 2024 December Mt Arthur/Tablelands/Cobb Valley November Queen Charlotte Track 2024 October Auckland Half Marathon 2024 Advanced Debugging Technology In Practice June Waihohonu Hut 2024 So You Want To Build A Browser Engine Real-Time Settlers Of Catan April Auckland Waterfront Half Marathon 2024 Whanganui River Journey 2024 2023 December Rees-Dart Track 2023 Caples/Routeburn Track 2023 Abel Tasman Kayaking November Mount Pirongia 2023 Blog Migrated April Why I Signed The "Pause" Letter Auckland Waterfront Half Marathon 2023 2022 December Travers-Sabine Circuit 2022 Paparoa Track September Aotea Track 2022 Success, Privilege And God July Tūrangi Road Trip May Round The Mountain Track: Ups and Downs and a Twist Ending April New Zealand's COVID Strategy Worked (But It Could Have Been Better) March Motutapu Island Camping Trip January Motatapu Track Hump Ridge Track The End Of The Runway 2021 December Mt Pirongia 2021 Do We Really Need A Link Step? November Some Observations On The NZ CovidPass System October How WHO Failed September Emulating AMD Approximate Arithmetic Instructions On Intel rr Trace Portability: Diverging Behavior of RSQRTSS in AMD vs Intel June Spectre Mitigations Murder *Userspace* Performance In The Presence Of Frequent Syscalls Tama Lakes Winter Tramp 2021 May Forward Compatibility Of rr Recordings Lake Waikaremoana 2021 April Print Debugging Should Go Away Demoing The Pernosco Omniscient Debugger: Debugging Crashes In Node.js And GDB Visualizing Control Flow In Pernosco March On-Premises Pernosco Now Available; Reflecting On Application Confinement What Would Jesus Do ... About Vaccination? February Mercer Bay January Dehydration Tongariro Northern Circuit 2021 2020 December Rees-Dart Track Kepler Track 2020 Exploiting Precognition In Binary Instrumentation Of rr Replays November rr remix: Efficient Replay-Only Binary Instrumentation DOM Recording For Web Application Demos Debugging With Screenshots In Pernosco rr Repository Moved To Independent Organisation Pernosco Now Available For Individual Developers Auckland Half Marathon 2020 October Pouakai Circuit 2020 The Parable Of The Two Bus Drivers September New Zealand's Long Term COVID19 Strategy August Surprising Words In Luke 1:16-17 What's So Amazing About Mark 10:32 Scaling Debuginfo For Zero-Cost Abstractions What Is The Minimal Set Of Optimizations Needed For Zero-Cost Abstraction? June Cape Brett 2020 My Google Maps Disaster May Why Forking HTML Into A Static Language Doesn't Make Sense Omniscient JS Debugging In Pernosco April Have Some Humility, Mike Hosking March What If C++ Abandoned Backward Compatibility? Debugging Gdb Using rr: Ptrace Emulation January Static Customization Of Function Signatures In Rust Updating Pernosco To Rust Futures 0.3 2019 December A Risk Of Transactional Politics For Christians Nelson Lakes Tramping: Lessons And Observations Nelson Lakes Tramping: Travers-Sabine Circuit Nelson Lakes Tramping: Angelus Basin November Your Debugger Sucks Supercharging Gdb With Pernosco The Power Of Collaborative Debugging Omniscient Printf Debugging In Pernosco The BBC's "War Of The Worlds" Explaining Dataflow In Pernosco October Improving Debugging Workflow With Pernosco Auckland Half Marathon 2019 Pernosco Demo Video Food In Auckland 2019 Pouakai Circuit Is Richard Dawkins A Moral Realist? September Dissatisfied With Docker July Cape Brett 2019 Auckland Rust Meetup: "Building An Omniscient Debugger In Rust" June Stack Write Traffic In Firefox Binaries Winter Tramp: Waihohonu Hut To Tama Lakes May A Few Comments On "Sparse Record And Replay With Controlled Scheduling" Microsoft's Azure Time-Travel Debugging Don't Call Socially Conservative Politicial Parties "Christian" Debugging Talk At Auckland Rust Meetup April Goodbye Mozilla IRC Update To rr Master To Debug Firefox Trunk Mysteriously Low Hanging Fruit: A Big Improvement To LLD For Rust Debug Builds Rust Discussion At IFP WG2.4 March Marama Davidson And The Truth About Auckland's History February Banning Huawei Is The Right Decision Rust's Affine Types Catch An Interesting Bug Mt Taranaki 2019 January Experimental Data On Reproducing Intermittent MongoDB Test Failures With rr Chaos Mode 2018 December Vox On Nietzsche Hollyford Track Milford Track 2018 November Capitalism, Competition And Microsoft Antitrust Action Raglan Comparing The Quality Of Debug Information Produced By Clang And Gcc What Is "Evil" Anyway? Comments on "REPT: Reverse Debugging of Failures in Deployed Software" October Auckland Half Marathon 2018 Problems Scaling A Large Multi-Crate Rust Project Harmful Clickbait Headline About IT Automation The Fine Line Between Being A Good Parent And A Bad Parent The Costs Of Programming Language Fragmentation September More Realistic Goals For C++ Lifetimes 1.0 The Danger Of GMail's "Smart Replies" "Crazy Rich Asians" Rangitoto Fog August Long Live The Desktop Computer ASAN And LSAN Work In rr Diagnosing A Weak Memory Ordering Bug The Parallel Stream Multiplexing Problem July Gerv Why Isn't Debugging Treated As A First-Class Activity? June Yosemite: Clouds Rest And Half Dome Bay Area Visit Crypto-Christians In Tech May rr 5.2.0 Released Intel CPU Bug Affecting rr Watchpoints Update: Pernosco rr Chaos Mode Improvements Research Wishlist: A Filesystem For Efficient Host-Guest File Sharing Priority Is Overrated April rr Trace Portability: x87 "Data Pointer" Broken On Skylake CPUID Features, XSAVE, And rr Trace Portability Heaphy Track #2 Payment Express's "Account2Account" Is Bad For Security March Speeding Up `dwarfdump` With Rust Too Many DWARF Packaging Options "Zach": AI Fraud In Christchurch Tongariro Northern Circuit #2 January Neal Stephenson's "Seveneves" (Mild Spoilers) Long-Term Consequences Of Spectre And Its Mitigations Captain Sonar Hoora For cargo build --all-targets The Fight For Patent-Unencumbered Media Codecs Is Nearly Won Ancient Browser-Wars History: MD5-Hashed Posts Declassified On Keeping Secrets Meltdown/Spectre Needs Better Disclosure 2017 December Mixed Blessings Of Greenfield Software Development Marriage On Credit Routeburn-Caples rr 5.1.0 Released Maintaining An Independent Browser Is Incredibly Expensive November In Praise Of Rust's structopt For Command Line Parsing Tararua Southern Crossing October Auckland Half Marathon 2017 Microsoft's Chrome Exploitation And The Limitations Of Control Flow Integrity "Slow To Become Angry" Type Safety And Data Flow Integrity Legacy Code Strikes Again Thoughts On Microsoft's Time-Travel Debugger Building On Rock, Not Sand Microsoft Using Chromium On Android Is Bad For The Web September Complaining About Twitter Again Dreaming The Singularity Facebook's "Explaining React's License" Doesn't Some Opinions On The History Of Web Audio Sonny The Prophet rr 5.0 Released rr Trace Portability August Fedora/Ubuntu Kernels Work With rr Again Igloos Are Hard Epsom Electorate Town Hall Meeting Public Service Announcement: "localhost" Is Not Necessarily Local When Virtue Fails Stabilizing The rr Trace Format With Cap’n Proto July Selecting A Compression Algorithm For rr Upstream Stable Kernels Work With rr Again Let's Never Create An Ad-Hoc Text Format Again Confession Of A C/C++ Program