diff --git a/job.go b/job.go
index 435edc9..42aa051 100644
--- a/job.go
+++ b/job.go
@@ -3,7 +3,6 @@ package queue
 import (
 	"context"
 	"fmt"
-	"strings"
 	"time"
 )
 
@@ -127,9 +126,6 @@ func (job *Job) IsFinished() bool {
 }
 
 func (job *Job) getKey() string {
-	if job.queue.config.Prefix != "" {
-		prefix := job.queue.config.Prefix
-		return fmt.Sprintf("%s:%s", strings.ToLower(prefix+job.queue.Name), job.Id)
-	}
-	return fmt.Sprintf("%s:%s", strings.ToLower(job.queue.Name), job.Id)
+	// Use cached queue key to avoid repeated string operations
+	return job.queue.cachedKey + ":" + job.Id
 }
diff --git a/queue.go b/queue.go
index e744192..af82696 100644
--- a/queue.go
+++ b/queue.go
@@ -32,6 +32,7 @@ type Queue struct {
 	running     bool
 	config      Options
 	Logger      Logger
+	cachedKey   string // Cache the computed key to avoid repeated string operations
 }
 
 type RateLimiter struct {
@@ -95,6 +96,13 @@ func New(name string, opt *Options) *Queue {
 		queue.config.Timeout = 1 * time.Minute
 	}
 
+	// Pre-compute and cache the key
+	if opt.Prefix != "" {
+		queue.cachedKey = strings.ToLower(opt.Prefix + name)
+	} else {
+		queue.cachedKey = strings.ToLower(name)
+	}
+
 	return queue
 }
 
@@ -110,8 +118,12 @@ func (q *Queue) AddJob(opt AddJobOptions) {
 		q.formatLog(LoggerInfo, "Add job %s to waiting", opt.Id)
 		job = q.newJob(opt)
 	}
-	q.jobs = append(q.jobs, *job)
-	sort.SliceStable(q.jobs, func(i, j int) bool { return q.jobs[i].Priority > q.jobs[j].Priority })
+	// Use binary search to find insertion point for O(log n) instead of O(n log n) sort
+	insertIdx := sort.Search(len(q.jobs), func(i int) bool {
+		return q.jobs[i].Priority < job.Priority
+	})
+	// Efficient insertion: grow slice and insert at correct position
+	q.jobs = append(q.jobs[:insertIdx], append([]Job{*job}, q.jobs[insertIdx:]...)...)
 	q.Run()
 }
 
@@ -125,7 +137,16 @@ type AddJobOptions struct {
 // rate limited, the jobs are delayed. Otherwise, the jobs are added to the
 // waiting list and the queue is run.
 func (q *Queue) BulkAddJob(options []AddJobOptions) {
+	if len(options) == 0 {
+		q.Run()
+		return
+	}
+	
+	// Sort input options by priority once
 	sort.SliceStable(options, func(i, j int) bool { return options[i].Priority > options[j].Priority })
+	
+	// Pre-allocate space for new jobs
+	newJobs := make([]Job, 0, len(options))
 	for _, option := range options {
 		var job *Job
 		if q.IsLimit() {
@@ -135,12 +156,34 @@ func (q *Queue) BulkAddJob(options []AddJobOptions) {
 			q.formatLog(LoggerInfo, "Add job %s to waiting", option.Id)
 			job = q.newJob(option)
 		}
-		q.jobs = append(q.jobs, *job)
+		newJobs = append(newJobs, *job)
 	}
-	sort.SliceStable(q.jobs, func(i, j int) bool { return q.jobs[i].Priority > q.jobs[j].Priority })
+	
+	// Merge sorted slices efficiently
+	q.jobs = mergeSortedJobs(q.jobs, newJobs)
 	q.Run()
 }
 
+// mergeSortedJobs merges two sorted job slices by priority (descending)
+func mergeSortedJobs(jobs1, jobs2 []Job) []Job {
+	result := make([]Job, 0, len(jobs1)+len(jobs2))
+	i, j := 0, 0
+	
+	for i < len(jobs1) && j < len(jobs2) {
+		if jobs1[i].Priority >= jobs2[j].Priority {
+			result = append(result, jobs1[i])
+			i++
+		} else {
+			result = append(result, jobs2[j])
+			j++
+		}
+	}
+	
+	result = append(result, jobs1[i:]...)
+	result = append(result, jobs2[j:]...)
+	return result
+}
+
 // Process sets the callback for the queue to process jobs. If the queue has a
 // scheduler, it will be started with the given cron pattern. Otherwise, the
 // callback is simply stored.
@@ -187,7 +230,6 @@ func (q *Queue) Run() {
 		numJobs := execJobs[:min]
 
 		ctx, cancel := context.WithTimeout(context.Background(), q.config.Timeout)
-		defer cancel()
 
 		var wg sync.WaitGroup
 		done := make(chan struct{})
@@ -218,6 +260,7 @@ func (q *Queue) Run() {
 		case <-ctx.Done():
 			q.MarkJobFailedTimeout(numJobs)
 		}
+		cancel()
 
 		// Handle remove job
 		execJobs = execJobs[min:]
@@ -256,12 +299,12 @@ func (q *Queue) Retry() {
 		numJobs := execJobs[:min]
 
 		ctx, cancel := context.WithTimeout(context.Background(), q.config.Timeout)
-		defer cancel()
 
 		var wg sync.WaitGroup
 		done := make(chan struct{})
 
 		var finishedJob []string
+		var finishedMu sync.Mutex
 		for i := range numJobs {
 			job := numJobs[i]
 			wg.Add(1)
@@ -269,7 +312,9 @@ func (q *Queue) Retry() {
 				defer wg.Done()
 				q.jobFnc(job)
 				if job.IsFinished() {
+					finishedMu.Lock()
 					finishedJob = append(finishedJob, job.Id)
+					finishedMu.Unlock()
 				}
 			}(job)
 		}
@@ -285,6 +330,7 @@ func (q *Queue) Retry() {
 		case <-ctx.Done():
 			q.MarkJobFailedTimeout(numJobs)
 		}
+		cancel()
 
 		if len(finishedJob) > 0 {
 			for _, id := range finishedJob {
@@ -423,9 +469,5 @@ func (q *Queue) log(logType LoggerType, format string, v ...any) {
 }
 
 func (q *Queue) getKey() string {
-	if q.config.Prefix != "" {
-		prefix := q.config.Prefix
-		return strings.ToLower(prefix + q.Name)
-	}
-	return strings.ToLower(q.Name)
+	return q.cachedKey
 }