Alex Bradbury | Igalia - Open Source Consultancy and Development

Alex Bradbury

Alex Bradbury

At Igalia since March 2022.

Cambridge (UK)

POSTS

Jan 7, 2026

Per-query energy consumption of LLMs

How much energy is consumed when querying an LLM? We’re largely in the dark when it comes to proprietary models, but for open weight models that anyone can host on...

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Dec 2, 2025

QEMU-based instruction execution counting

Although analysing performance by way of instruction counting has obvious limitations, it can be helpful (especially when combined with appropriate analysis scripts) to get rapid feedback on the impact of...

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Dec 1, 2025

Minipost: Olmo 3 training cost

Recently I jotted down some notes on LLM inference vs training costs for DeepSeek and I wanted to add on an additional datapoint for training cost based on the recently...

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Nov 30, 2025

Minipost: Benchmarking the Hetzner AX102 vs CCX53

I recently had reason to do a quick comparison of the performance of the Hetzner AX102 dedicated server and the high-end ‘dedicated’ CCX53 VPS on Hetzner Cloud and thought I...

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Media

Improvements to RISC-V Vector Code Generation in LLVM

Improvements to RISC-V Vector Code Generation in LLVM

Jul 7, 2025 Slides (354 KB PDF)

Lessons learned from leveling up RISC-V LLVM testing

Lessons learned from leveling up RISC-V LLVM testing

Jun 9, 2025

RISC-Y Business

RISC-Y Business

Jan 31, 2025

Toots

2% of Golang 2025 survey respondents are deploying their Go software to RISC-V. Take that, s390x! https://go.dev/blog/survey2025#operating-systems-and-architectures

Wake up babe, new proposed RISC-V base ISA names just dropped. https://lists.riscv.org/g/tech-unprivileged/topic/longer_base_name_proposal/116854896How long until we see an rv32lbefx_mafc_zicntr_zicsr_zifencei_zba_zbb_zbs_zca_zfa in the...

I’ve started writing up the flow I use for capturing instruction execution frequency data from benchmarks using QEMU. First we...

Unknown whether this is due to changes in default buffer size in sox, the Linux audio stack, or otherwise, but...

Commits

[LLVM] Revert "[DAG] Enable bitcast STLF for Constant/Undef" (#178872)

[LLVM] [lld][COFF][NFC] Fix warnings on 32-bit asserts builds (#176178)

[LLVM] [MC][NFC] Use appendLEB128 helper in MCDwarf.cpp (#175962)

[LLVM] [RISCV] Fix ReplaceNodeResults of Intrinsic::experimental_cttz_elts f…