I build infrastructure
for millions of users.

Fixed sharded approx_topk queries failing to parse on the querier in Grafana Loki. When approx_topk is sharded, the shard mapper rewrites it into downstream __count_min_sketch__ sub-queries that the query-frontend serializes to LogQL and re-parses on the querier — but __count_min_sketch__ was never registered in the LogQL lexer or grammar, so the querier rejected it with a syntax error surfacing as an HTTP 400. Registered __count_min_sketch__ as a vector operation in the lexer (functionTokens) and grammar (vectorOp), regenerated syntax.y.go with the pinned goyacc, and added a regression test asserting every downstream sub-query round-trips through String() → ParseExpr(). Fixes #23150.

go · grafana loki · logql · goyacc · open source

Extended the lazy-decorator work from #4639 to the 2022.3 @observable accessor decorator (requested by the maintainer). The accessor init callback no longer eagerly constructs an ObservableValue for every decorated field on every instance; instead it registers a factory on the admin's new lazyObservableKeys_ map, and materializeLazyObservable_ instantiates the ObservableValue on first read/write/observe via getObservablePropValue_, setObservablePropValue_, and getAtom. isObservableProp checks lazyObservableKeys_ so fields still report as observable before first read, and the post-read hot path stays a single Map lookup. Benchmarks on a 50k-instance × 10-field class show construction allocation roughly halved (~224 MB → ~119 MB) for sparse-access workloads. Full suite green (1043 passing) and type checks clean. Closes #4616.

typescript · mobx · decorators · performance · open source

Made the 2022.3 @computed decorator lazy in MobX core. ComputedValue is now created on first read of the decorated getter instead of eagerly during instance construction, so getters that are never accessed on a given instance no longer allocate. Threaded the laziness through getObservablePropValue_, setObservablePropValue_, getAtom, and isObservableProp so existing call sites Just Work. Closes #4616.

typescript · mobx · decorators · open source

Fixed the Node http adapter clobbering a user-supplied Host header when forwarding through a proxy. axios was unconditionally rewriting options.headers.host to the request URL's hostname:port, making it impossible to route a proxy to a virtual host that differed from the request URL. The fix only sets the default Host header when the caller has not already provided one (case-insensitive match on host/Host/HOST). Closes #10805.

javascript · node.js · http · axios · open source

Fixed an overlay-injection crash in the Vue DevTools Vite plugin under strict Trusted Types CSP. With `require-trusted-types-for 'script'` enforced, assigning a plain string to script.src (a Trusted Types sink) was blocked before the app's own default policy could register, since the overlay is injected via head-prepend and runs ahead of the entry module. The fix wraps the overlay URL through a named vue-devtools TrustedScriptURL policy when window.trustedTypes is available, with a plain-string fallback otherwise. Closes #1086.

javascript · vue · vite · trusted types · csp · open source

Fixed silent dropping of valid runtime prop types in defineProps when a Vue ref-wrapper type appears in a union and the vue import cannot be resolved by the SFC compiler (e.g. the type lives in a separately-built consumed package). resolveTypeReference was throwing inside inferRuntimeType, the top-level catch collapsed the whole branch to UNKNOWN_TYPE, and the resulting filtering dropped real types like Array — producing "Invalid prop: type check failed" warnings at runtime for valid values. The fix catches the resolution failure locally inside the TSTypeReference case and adds built-in fallbacks for Ref, ShallowRef, ComputedRef, WritableComputedRef, MaybeRef<T>, and MaybeRefOrGetter<T>, mirroring existing handling for Promise / Date / Map. Closes #14729.

typescript · vue · compiler-sfc · open source

Reported a regression in defineProps<T>() runtime type inference after upgrading Vue from 3.5.21 to 3.5.31: a union involving MaybeRef<OptionItem[]> lost its Array branch in the generated runtime props, so passing arrays triggered "Invalid prop: type check failed" warnings even though the source TS type allowed them. Provided a minimal reproduction and isolated the regression to SFC type-to-runtime inference for ref-wrapper unions; tracked and fixed by PR #14758.

vue · compiler-sfc · typescript · bug report · open source

Open source contribution to Grafana Backup Tool, for backing up and restoring Grafana dashboards, datasources, and other configurations. Contributed improvements and enhancements to the project.

grafana · backup tool · open source

Open source contribution to Grafana, the open source analytics and monitoring platform. Contributed improvements and enhancements to the project.

grafana · go · typescript · open source

Open source contribution to Apache Pinot, a real-time distributed OLAP datastore. Contributed improvements and enhancements to the project.

java · apache pinot · open source