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This commit replaces the map-based `lookupKeyword` with a generated `lookupKeywordFast` switch statement, dramatically reducing memory allocations and keyword lookup latency during parsing. Co-authored-by: srimon12 <33979603+srimon12@users.noreply.github.com>
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📝 WalkthroughWalkthroughAdds a Go code generator ( ChangesFast keyword lookup generation
Estimated code review effort: 2 (Simple) | ~15 minutes Sequence Diagram(s)Not applicable — the change is a self-contained code generation and lookup delegation update without multi-component runtime interactions. Suggested labels: performance, lexer, code-generation Suggested reviewers: srimon12 Poem A rabbit hopped through switch and case, 🚥 Pre-merge checks | ✅ 5✅ Passed checks (5 passed)
✨ Finishing Touches📝 Generate docstrings
🧪 Generate unit tests (beta)
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Actionable comments posted: 2
🧹 Nitpick comments (1)
internal/lexer/generate_lookup.go (1)
165-165: 📐 Maintainability & Code Quality | 🔵 Trivial | ⚡ Quick winIgnored error from
os.WriteFile.The generator silently drops the write error, so a failed regeneration (permissions, disk, etc.) leaves a stale
lookup_fast.gowith no indication anything went wrong.♻️ Proposed fix
- os.WriteFile("lookup_fast.go", []byte(sb.String()), 0644) + if err := os.WriteFile("lookup_fast.go", []byte(sb.String()), 0644); err != nil { + fmt.Fprintln(os.Stderr, "failed to write lookup_fast.go:", err) + os.Exit(1) + }🤖 Prompt for AI Agents
Verify each finding against current code. Fix only still-valid issues, skip the rest with a brief reason, keep changes minimal, and validate. In `@internal/lexer/generate_lookup.go` at line 165, The lookup generator currently ignores the result of os.WriteFile when producing lookup_fast.go, so failures are silently lost. Update the generate_lookup.go logic around the file write to handle the returned error explicitly, using the surrounding generator flow in generateLookup to report or propagate the failure instead of continuing as if regeneration succeeded.
🤖 Prompt for all review comments with AI agents
Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.
Inline comments:
In `@internal/lexer/generate_lookup.go`:
- Around line 13-112: The keyword list is duplicated between the lookup
generator and the lexer, which can drift over time. Consolidate the canonical
keyword table used by generate_lookup.go and lexer.go so there is a single
source of truth, and update the generation/path in the relevant keyword handling
symbols (such as keywords and the lexer keyword matching logic) to consume that
shared data instead of maintaining two separate copies.
In `@internal/lexer/lexer.go`:
- Around line 324-326: Remove the unused keyword lookup code in
internal/lexer/lexer.go: since lookupKeyword now just delegates to
lookupKeywordFast, delete the old keywords map and the hasPrefixCaseInsensitive
helper along with any related dead references. Keep lookupKeyword and
lookupKeywordFast as the active path, and make sure the lexer package still
compiles cleanly with no unused declarations for staticcheck/U1000.
---
Nitpick comments:
In `@internal/lexer/generate_lookup.go`:
- Line 165: The lookup generator currently ignores the result of os.WriteFile
when producing lookup_fast.go, so failures are silently lost. Update the
generate_lookup.go logic around the file write to handle the returned error
explicitly, using the surrounding generator flow in generateLookup to report or
propagate the failure instead of continuing as if regeneration succeeded.
🪄 Autofix (Beta)
Fix all unresolved CodeRabbit comments on this PR:
- Push a commit to this branch (recommended)
- Create a new PR with the fixes
ℹ️ Review info
⚙️ Run configuration
Configuration used: defaults
Review profile: CHILL
Plan: Pro Plus
Run ID: 2f48d3df-ff9a-455b-a1af-a011966def58
📒 Files selected for processing (5)
.jules/bolt.mdinternal/lexer/generate.gointernal/lexer/generate_lookup.gointernal/lexer/lexer.gointernal/lexer/lookup_fast.go
| var keywords = map[string]string{ | ||
| "GEO_BBOX": "TokenKindGeoBbox", | ||
| "GEO_RADIUS": "TokenKindGeoRadius", | ||
| "VALUES_COUNT": "TokenKindValuesCount", | ||
| "HAS_VECTOR": "TokenKindHasVector", | ||
| "BOOST": "TokenKindBoost", | ||
| "DEFAULTS": "TokenKindDefaults", | ||
| "CASE": "TokenKindCase", | ||
| "WHEN": "TokenKindWhen", | ||
| "THEN": "TokenKindThen", | ||
| "ELSE": "TokenKindElse", | ||
| "END": "TokenKindEnd", | ||
| "INSERT": "TokenKindInsert", | ||
| "INTO": "TokenKindInto", | ||
| "COLLECTION": "TokenKindCollection", | ||
| "VALUES": "TokenKindValues", | ||
| "USING": "TokenKindUsing", | ||
| "MODEL": "TokenKindModel", | ||
| "HYBRID": "TokenKindHybrid", | ||
| "DENSE": "TokenKindDense", | ||
| "SPARSE": "TokenKindSparse", | ||
| "RERANK": "TokenKindRerank", | ||
| "EXACT": "TokenKindExact", | ||
| "WITH": "TokenKindWith", | ||
| "AS": "TokenKindAs", | ||
| "ACORN": "TokenKindAcorn", | ||
| "QUANTIZE": "TokenKindQuantize", | ||
| "SCALAR": "TokenKindScalar", | ||
| "BINARY": "TokenKindBinary", | ||
| "PRODUCT": "TokenKindProduct", | ||
| "TURBO": "TokenKindTurbo", | ||
| "BITS": "TokenKindBits", | ||
| "QUANTILE": "TokenKindQuantile", | ||
| "ALWAYS": "TokenKindAlways", | ||
| "RAM": "TokenKindRam", | ||
| "HNSW": "TokenKindHnsw", | ||
| "VECTORS": "TokenKindVectors", | ||
| "OPTIMIZERS": "TokenKindOptimizers", | ||
| "PARAMS": "TokenKindParams", | ||
| "DISABLED": "TokenKindDisabled", | ||
| "CREATE": "TokenKindCreate", | ||
| "ALTER": "TokenKindAlter", | ||
| "DROP": "TokenKindDrop", | ||
| "SHOW": "TokenKindShow", | ||
| "COLLECTIONS": "TokenKindCollections", | ||
| "SELECT": "TokenKindSelect", | ||
| "SCROLL": "TokenKindScroll", | ||
| "AFTER": "TokenKindAfter", | ||
| "RECOMMEND": "TokenKindRecommend", | ||
| "QUERY": "TokenKindQuery", | ||
| "NEAREST": "TokenKindNearest", | ||
| "CONTEXT": "TokenKindContext", | ||
| "DISCOVER": "TokenKindDiscover", | ||
| "PAIRS": "TokenKindPairs", | ||
| "TARGET": "TokenKindTarget", | ||
| "ORDER": "TokenKindOrder", | ||
| "ASC": "TokenKindAsc", | ||
| "DESC": "TokenKindDesc", | ||
| "LIMIT": "TokenKindLimit", | ||
| "GROUP": "TokenKindGroup", | ||
| "BY": "TokenKindBy", | ||
| "GROUP_SIZE": "TokenKindGroupSize", | ||
| "STRATEGY": "TokenKindStrategy", | ||
| "DELETE": "TokenKindDelete", | ||
| "UPDATE": "TokenKindUpdate", | ||
| "SET": "TokenKindSet", | ||
| "VECTOR": "TokenKindVector", | ||
| "PAYLOAD": "TokenKindPayload", | ||
| "FROM": "TokenKindFrom", | ||
| "WHERE": "TokenKindWhere", | ||
| "ID": "TokenKindId", | ||
| "INDEX": "TokenKindIndex", | ||
| "ON": "TokenKindOn", | ||
| "FOR": "TokenKindFor", | ||
| "TYPE": "TokenKindType", | ||
| "AND": "TokenKindAnd", | ||
| "OR": "TokenKindOr", | ||
| "NOT": "TokenKindNot", | ||
| "IN": "TokenKindIn", | ||
| "BETWEEN": "TokenKindBetween", | ||
| "IS": "TokenKindIs", | ||
| "NULL": "TokenKindNull", | ||
| "EMPTY": "TokenKindEmpty", | ||
| "MATCH": "TokenKindMatch", | ||
| "ANY": "TokenKindAny", | ||
| "PHRASE": "TokenKindPhrase", | ||
| "OFFSET": "TokenKindOffset", | ||
| "SCORE": "TokenKindScore", | ||
| "THRESHOLD": "TokenKindThreshold", | ||
| "LOOKUP": "TokenKindLookup", | ||
| "COSINE": "TokenKindCosine", | ||
| "DOT": "TokenKindDot", | ||
| "EUCLID": "TokenKindEuclid", | ||
| "MANHATTAN": "TokenKindManhattan", | ||
| "PREFETCH": "TokenKindPrefetch", | ||
| "FUSION": "TokenKindFusion", | ||
| "SAMPLE": "TokenKindSample", | ||
| "RELEVANCE": "TokenKindRelevance", | ||
| "FEEDBACK": "TokenKindFeedback", | ||
| } |
There was a problem hiding this comment.
📐 Maintainability & Code Quality | 🟠 Major | ⚡ Quick win
🧩 Analysis chain
🏁 Script executed:
#!/bin/bash
# Check whether the old lexer.go `keywords` map (and its former helper) are still used anywhere.
rg -n 'keywords\b' internal/lexer/*.go
echo "---"
rg -n 'hasPrefixCaseInsensitive' internal/lexer/*.goRepository: srimon12/qql-go
Length of output: 549
🏁 Script executed:
#!/bin/bash
set -euo pipefail
echo "=== file map ==="
git ls-files internal/lexer/*.go
echo
echo "=== outline generate_lookup.go ==="
ast-grep outline internal/lexer/generate_lookup.go --view expanded || true
echo
echo "=== outline lexer.go ==="
ast-grep outline internal/lexer/lexer.go --view expanded || true
echo
echo "=== relevant slices: generate_lookup.go ==="
sed -n '1,220p' internal/lexer/generate_lookup.go
echo
echo "=== relevant slices: lexer.go ==="
sed -n '1,120p' internal/lexer/lexer.goRepository: srimon12/qql-go
Length of output: 9802
🏁 Script executed:
#!/bin/bash
set -euo pipefail
rg -n "generate_lookup|TokenKind" internal/lexer README.md .github . || true
echo "---"
sed -n '120,220p' internal/lexer/generate_lookup.go
echo "---"
sed -n '1,90p' internal/lexer/lexer.goRepository: srimon12/qql-go
Length of output: 50372
🏁 Script executed:
#!/bin/bash
set -euo pipefail
python3 - <<'PY'
import re
from pathlib import Path
def parse_map(path, key_pat, val_pat):
text = Path(path).read_text()
m = re.search(r'var keywords = map\[[^\]]+\][^{]*\{(.*?)^\}', text, re.S | re.M)
if not m:
raise SystemExit(f"could not find keywords map in {path}")
body = m.group(1)
pairs = re.findall(r'^\s*"([^"]+)"\s*:\s*([^,\n]+),\s*$', body, re.M)
return dict(pairs)
gen = parse_map("internal/lexer/generate_lookup.go", None, None)
lex = parse_map("internal/lexer/lexer.go", None, None)
gen_keys = set(gen)
lex_keys = set(lex)
print("generate_lookup.go entries:", len(gen))
print("lexer.go entries:", len(lex))
print("same keys:", gen_keys == lex_keys)
print("only in generate_lookup.go:", sorted(gen_keys - lex_keys))
print("only in lexer.go:", sorted(lex_keys - gen_keys))
# spot-check value naming correspondence
mismatched = []
for k in sorted(gen_keys & lex_keys):
expected = "TokenKind" + "".join(part.capitalize() for part in k.lower().split("_"))
if gen[k] != f'"{expected}"' and lex[k] != expected:
mismatched.append((k, gen[k], lex[k]))
print("mismatched samples:", mismatched[:5])
PYRepository: srimon12/qql-go
Length of output: 296
Keep a single canonical keyword table internal/lexer/generate_lookup.go and internal/lexer/lexer.go still duplicate the same 98 keywords, so edits can drift. Generate one from the other or move the list into shared data.
🤖 Prompt for AI Agents
Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.
In `@internal/lexer/generate_lookup.go` around lines 13 - 112, The keyword list is
duplicated between the lookup generator and the lexer, which can drift over
time. Consolidate the canonical keyword table used by generate_lookup.go and
lexer.go so there is a single source of truth, and update the generation/path in
the relevant keyword handling symbols (such as keywords and the lexer keyword
matching logic) to consume that shared data instead of maintaining two separate
copies.
| func lookupKeyword(s string) (TokenKind, bool) { | ||
| if kind, ok := keywords[s]; ok { | ||
| return kind, true | ||
| } | ||
|
|
||
| if len(s) <= 16 { | ||
| var buf [16]byte | ||
| for i := 0; i < len(s); i++ { | ||
| c := s[i] | ||
| if c >= 'a' && c <= 'z' { | ||
| c -= 32 | ||
| } | ||
| buf[i] = c | ||
| } | ||
| if kind, ok := keywords[string(buf[:len(s)])]; ok { | ||
| return kind, true | ||
| } | ||
| return 0, false | ||
| } | ||
|
|
||
| for kw, kind := range keywords { | ||
| if len(kw) == len(s) && hasPrefixCaseInsensitive(s, kw) { | ||
| return kind, true | ||
| } | ||
| } | ||
| return 0, false | ||
| return lookupKeywordFast(s) | ||
| } |
There was a problem hiding this comment.
📐 Maintainability & Code Quality | 🟡 Minor | ⚡ Quick win
🧩 Analysis chain
🏁 Script executed:
#!/bin/bash
# Confirm no remaining references to the old map/helper in this package.
rg -n 'keywords\b' internal/lexer/*.go
echo "---"
rg -n 'hasPrefixCaseInsensitive' internal/lexer/*.goRepository: srimon12/qql-go
Length of output: 549
🏁 Script executed:
#!/bin/bash
set -euo pipefail
printf 'Files:\n'
git ls-files internal/lexer
printf '\n--- lexer.go (top and lookup area) ---\n'
sed -n '1,120p' internal/lexer/lexer.go
printf '\n...\n'
sed -n '300,380p' internal/lexer/lexer.go
printf '\n--- lookup_fast.go ---\n'
sed -n '1,220p' internal/lexer/lookup_fast.go
printf '\n--- references to hasPrefixCaseInsensitive / keywords in internal/lexer ---\n'
rg -n 'hasPrefixCaseInsensitive|\\bkeywords\\b' internal/lexerRepository: srimon12/qql-go
Length of output: 27055
Remove the dead keyword lookup helpers
lookupKeyword now only forwards to lookupKeywordFast, so the old keywords map and hasPrefixCaseInsensitive helper in internal/lexer/lexer.go are no longer referenced. Dropping them will avoid leftover dead code and keep the package clean for staticcheck/U1000.
🤖 Prompt for AI Agents
Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.
In `@internal/lexer/lexer.go` around lines 324 - 326, Remove the unused keyword
lookup code in internal/lexer/lexer.go: since lookupKeyword now just delegates
to lookupKeywordFast, delete the old keywords map and the
hasPrefixCaseInsensitive helper along with any related dead references. Keep
lookupKeyword and lookupKeywordFast as the active path, and make sure the lexer
package still compiles cleanly with no unused declarations for
staticcheck/U1000.
1 participant
💡 What: Replaced the map-based keyword lookup in the lexer with a
go generate-createdswitchstatement (lookupKeywordFast).🎯 Why: In Go, slicing a byte array into a string (
string(buf[:len(s)])) and looking it up in a map incurs heap allocation and map hashing overhead. In the hot path of the lexer, this limits throughput. A generated switch statement provides zero-allocation, direct byte-level matching.📊 Impact: Expected ~4-5x faster keyword lookups (from ~60ns/op down to ~13ns/op) and entirely eliminates memory allocations per keyword lookup (
0 B/op,0 allocs/op). Overall parser throughput is measurably improved as a result.🔬 Measurement: Run
go test -bench . -benchmem ./internal/lexer/and verify thatBenchmarkLookupKeywordFastis drastically faster and has 0 allocs compared to the originalBenchmarkLookupKeyword. Tests can also be verified by runninggo test ./....PR created automatically by Jules for task 3153547589374349199 started by @srimon12
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